@ohos.web.webview (Webview)

The Webview module provides APIs for web control. It can be used with the <Web> component, which can be used to display web pages.

NOTE

• The initial APIs of this module are supported since API version 9. Updates will be marked with a superscript to indicate their earliest API version.

• You can preview how the APIs of this module work on a real device. The preview is not yet available in the DevEco Studio Previewer.

Required Permissions

ohos.permission.INTERNET, required for accessing online web pages. For details about how to apply for a permission, see Declaring Permissions.

Modules to Import

import web_webview from '@ohos.web.webview';

once

once(type: string, callback: Callback<void>): void

Registers a one-time callback for web events of the specified type.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

web_webview.once("webInited", () => {
  console.log("setCookie")
  web_webview.WebCookieManager.setCookie("https://www.example.com", "a=b")
})

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

WebMessagePort

Implements a WebMessagePort object to send and receive messages.

close

close(): void

Closes this message port.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  msgPort: web_webview.WebMessagePort[] = null;

  build() {
    Column() {
      Button('close')
        .onClick(() => {
          if (this.msgPort && this.msgPort[1]) {
            this.msgPort[1].close();
          } else {
            console.error("msgPort is null, Please initialize first");
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

postMessageEvent

postMessageEvent(message: WebMessage): void

Sends a message. For the complete sample code, see postMessage.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  ports: web_webview.WebMessagePort[];

  build() {
    Column() {
      Button('postMessageEvent')
        .onClick(() => {
          try {
            this.ports = this.controller.createWebMessagePorts();
            this.controller.postMessage('__init_port__', [this.ports[0]], '*');
            this.ports[1].postMessageEvent("post message from ets to html5");
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

onMessageEvent

onMessageEvent(callback: (result: WebMessage) => void): void

Registers a callback to receive messages from the HTML5 side. For the complete sample code, see postMessage.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  ports: web_webview.WebMessagePort[];

  build() {
    Column() {
      Button('onMessageEvent')
        .onClick(() => {
          try {
            this.ports = this.controller.createWebMessagePorts();
            this.ports[1].onMessageEvent((msg) => {
              if (typeof(msg) == "string") {
                console.log("received string message from html5, string is:" + msg);
              } else if (typeof(msg) == "object") {
                if (msg instanceof ArrayBuffer) {
                  console.log("received arraybuffer from html5, length is:" + msg.byteLength);
                } else {
                  console.log("not support");
                }
              } else {
                console.log("not support");
              }
            })
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

WebviewController

Implements a WebviewController to control the behavior of the <Web> component. A WebviewController can control only one <Web> component, and the APIs (except static APIs) in the WebviewController can be invoked only after it has been bound to the target <Web> component.

initializeWebEngine

static initializeWebEngine(): void

Loads the dynamic link library (DLL) file of the web engine. This API can be called before the <Web> component is initialized to improve the startup performance.

System capability: SystemCapability.Web.Webview.Core

Example

The following code snippet exemplifies calling this API after the MainAbility is created.

// xxx.ts
import UIAbility from '@ohos.app.ability.UIAbility';
import web_webview from '@ohos.web.webview';

export default class EntryAbility extends UIAbility {
    onCreate(want, launchParam) {
        console.log("EntryAbility onCreate")
        web_webview.WebviewController.initializeWebEngine()
        globalThis.abilityWant = want
        console.log("EntryAbility onCreate done")
    }
}

Creating an Object

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

setWebDebuggingAccess

static setWebDebuggingAccess(webDebuggingAccess: boolean): void

Sets whether to enable web debugging.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  aboutToAppear():void {
    try {
      web_webview.WebviewController.setWebDebuggingAccess(true);
    } catch(error) {
      console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
    }
  }

  build() {
    Column() {
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

loadUrl

loadUrl(url: string | Resource, headers?: Array<WebHeader>): void

Loads a specified URL.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('loadUrl')
        .onClick(() => {
          try {
            // The URL to be loaded is of the string type.
            this.controller.loadUrl('www.example.com');
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('loadUrl')
        .onClick(() => {
          try {
            // The headers parameter is carried.
            this.controller.loadUrl('www.example.com', [{headerKey: "headerKey", headerValue: "headerValue"}]);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

There are two methods for loading local resource files:

1. Using $rawfile

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('loadUrl')
        .onClick(() => {
          try {
            // The URL to be loaded is of the Resource type.
            this.controller.loadUrl($rawfile('xxx.html'));
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

2. Using a sandbox path. For details, see the example of loading local resource files in the sandbox in Web.

<!-- xxx.html -->
<!DOCTYPE html>
<html>
  <body>
    <p>Hello World</p>
  </body>
</html>

loadData

loadData(data: string, mimeType: string, encoding: string, baseUrl?: string, historyUrl?: string): void

Loads specified data.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('loadData')
        .onClick(() => {
          try {
            this.controller.loadData(
              "<html><body bgcolor=\"white\">Source:<pre>source</pre></body></html>",
              "text/html",
              "UTF-8"
            );
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

Example of loading local resource:

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  updataContent: string = '<body><div><image src=file:///data/storage/el1/bundle/entry/resources/rawfile/xxx.png alt="image -- end" width="500" height="250"></image></div></body>'

  build() {
    Column() {
      Button('loadData')
        .onClick(() => {
          try {
            this.controller.loadData(this.updataContent, "text/html", "UTF-8", " ", " ");
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

accessForward

accessForward(): boolean

Checks whether moving to the next page can be performed on the current page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('accessForward')
        .onClick(() => {
          try {
            let result = this.controller.accessForward();
            console.log('result:' + result);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

forward

forward(): void

Moves to the next page based on the history stack. This API is generally used together with accessForward.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('forward')
        .onClick(() => {
          try {
            this.controller.forward();
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

accessBackward

accessBackward(): boolean

Checks whether moving to the previous page can be performed on the current page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('accessBackward')
        .onClick(() => {
          try {
            let result = this.controller.accessBackward();
            console.log('result:' + result);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

backward

backward(): void

Moves to the previous page based on the history stack. This API is generally used together with accessBackward.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('backward')
        .onClick(() => {
          try {
            this.controller.backward();
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

onActive

onActive(): void

Invoked to instruct the <Web> component to enter the foreground, active state.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('onActive')
        .onClick(() => {
          try {
            this.controller.onActive();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

onInactive

onInactive(): void

Invoked to instruct the <Web> component to enter the inactive state.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('onInactive')
        .onClick(() => {
          try {
            this.controller.onInactive();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

refresh

refresh(): void

Invoked to instruct the <Web> component to refresh the web page.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('refresh')
        .onClick(() => {
          try {
            this.controller.refresh();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

accessStep

accessStep(step: number): boolean

Checks whether a specific number of steps forward or backward can be performed on the current page.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State steps: number = 2;

  build() {
    Column() {
      Button('accessStep')
        .onClick(() => {
          try {
            let result = this.controller.accessStep(this.steps);
            console.log('result:' + result);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

clearHistory

clearHistory(): void

Clears the browsing history.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('clearHistory')
        .onClick(() => {
          try {
            this.controller.clearHistory();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getHitTest

getHitTest(): WebHitTestType

Obtains the element type of the area being clicked.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getHitTest')
        .onClick(() => {
          try {
            let hitTestType = this.controller.getHitTest();
            console.log("hitTestType: " + hitTestType);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

registerJavaScriptProxy

registerJavaScriptProxy(object: object, name: string, methodList: Array<string>): void

Registers a JavaScript object with the window. APIs of this object can then be invoked in the window. After this API is called, call refresh for the registration to take effect.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct Index {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  testObj = {
    test: (data) => {
      return "ArkUI Web Component";
    },
    toString: () => {
      console.log('Web Component toString');
    }
  }

  build() {
    Column() {
      Button('refresh')
        .onClick(() => {
          try {
            this.controller.refresh();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Button('Register JavaScript To Window')
        .onClick(() => {
          try {
            this.controller.registerJavaScriptProxy(this.testObj, "objName", ["test", "toString"]);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: $rawfile('index.html'), controller: this.controller })
        .javaScriptAccess(true)
    }
  }
}

runJavaScript

runJavaScript(script: string, callback : AsyncCallback<string>): void

Executes a JavaScript script. This API uses an asynchronous callback to return the script execution result. runJavaScript can be invoked only after loadUrl is executed. For example, it can be invoked in onPageEnd.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State webResult: string = ''

  build() {
    Column() {
      Text(this.webResult).fontSize(20)
      Web({ src: $rawfile('index.html'), controller: this.controller })
        .javaScriptAccess(true)
        .onPageEnd(e => {
          try {
            this.controller.runJavaScript(
              'test()',
              (error, result) => {
                if (error) {
                  console.info(`run JavaScript error: ` + JSON.stringify(error))
                  return;
                }
                if (result) {
                  this.webResult = result
                  console.info(`The test() return value is: ${result}`)
                }
              });
            console.info('url: ', e.url);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
    }
  }
}

runJavaScript

runJavaScript(script: string): Promise<string>

Executes a JavaScript script. This API uses a promise to return the script execution result. runJavaScript can be invoked only after loadUrl is executed. For example, it can be invoked in onPageEnd.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State webResult: string = '';

  build() {
    Column() {
      Text(this.webResult).fontSize(20)
      Web({ src: $rawfile('index.html'), controller: this.controller })
        .javaScriptAccess(true)
        .onPageEnd(e => {
          try {
            this.controller.runJavaScript('test()')
              .then(function (result) {
                console.log('result: ' + result);
              })
              .catch(function (error) {
                console.error("error: " + error);
              })
            console.info('url: ', e.url);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
    }
  }
}

deleteJavaScriptRegister

deleteJavaScriptRegister(name: string): void

Deletes a specific application JavaScript object that is registered with the window through registerJavaScriptProxy. The deletion takes effect immediately without invoking the refresh API.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State name: string = 'Object';

  build() {
    Column() {
      Button('deleteJavaScriptRegister')
        .onClick(() => {
          try {
            this.controller.deleteJavaScriptRegister(this.name);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

zoom

zoom(factor: number): void

Zooms in or out of this web page.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State factor: number = 1;

  build() {
    Column() {
      Button('zoom')
        .onClick(() => {
          try {
            this.controller.zoom(this.factor);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

searchAllAsync

searchAllAsync(searchString: string): void

Searches the web page for content that matches the keyword specified by 'searchString' and highlights the matches on the page. This API returns the result asynchronously through onSearchResultReceive.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State searchString: string = "xxx";

  build() {
    Column() {
      Button('searchString')
        .onClick(() => {
          try {
            this.controller.searchAllAsync(this.searchString);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
        .onSearchResultReceive(ret => {
          console.log("on search result receive:" + "[cur]" + ret.activeMatchOrdinal +
          "[total]" + ret.numberOfMatches + "[isDone]" + ret.isDoneCounting);
        })
    }
  }
}

clearMatches

clearMatches(): void

Clears the matches found through searchAllAsync.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('clearMatches')
        .onClick(() => {
          try {
            this.controller.clearMatches();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

searchNext

searchNext(forward: boolean): void

Searches for and highlights the next match.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('searchNext')
        .onClick(() => {
          try {
            this.controller.searchNext(true);
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

clearSslCache

clearSslCache(): void

Clears the user operation corresponding to the SSL certificate error event recorded by the <Web> component.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('clearSslCache')
        .onClick(() => {
          try {
            this.controller.clearSslCache();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

clearClientAuthenticationCache

clearClientAuthenticationCache(): void

Clears the user operation corresponding to the client certificate request event recorded by the <Web> component.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('clearClientAuthenticationCache')
        .onClick(() => {
          try {
            this.controller.clearClientAuthenticationCache();
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

createWebMessagePorts

createWebMessagePorts(): Array<WebMessagePort>

Creates web message ports.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
controller: web_webview.WebviewController = new web_webview.WebviewController();
ports: web_webview.WebMessagePort[];

build() {
  Column() {
    Button('createWebMessagePorts')
      .onClick(() => {
        try {
          this.ports = this.controller.createWebMessagePorts();
          console.log("createWebMessagePorts size:" + this.ports.length)
        } catch (error) {
          console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
        }
      })
    Web({ src: 'www.example.com', controller: this.controller })
  }
}
}

postMessage

postMessage(name: string, ports: Array<WebMessagePort>, uri: string): void

Sends a web message to an HTML5 window.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  ports: web_webview.WebMessagePort[];
  @State sendFromEts: string = 'Send this message from ets to HTML';
  @State receivedFromHtml: string = 'Display received message send from HTML';

  build() {
    Column() {
      // Display the received HTML content.
      Text(this.receivedFromHtml)
      // Send the content in the text box to an HTML window.
      TextInput({placeholder: 'Send this message from ets to HTML'})
        .onChange((value: string) => {
          this.sendFromEts = value;
      })

      Button('postMessage')
        .onClick(() => {
          try {
            // 1. Create two message ports.
            this.ports = this.controller.createWebMessagePorts();
            // 2. Register a callback on a message port (for example, port 1) on the application side.
            this.ports[1].onMessageEvent((result: web_webview.WebMessage) => {
              let msg = 'Got msg from HTML:';
              if (typeof(result) == "string") {
                console.log("received string message from html5, string is:" + result);
                msg = msg + result;
              } else if (typeof(result) == "object") {
                if (result instanceof ArrayBuffer) {
                  console.log("received arraybuffer from html5, length is:" + result.byteLength);
                  msg = msg + "lenght is " + result.byteLength;
                } else {
                  console.log("not support");
                }
              } else {
                console.log("not support");
              }
              this.receivedFromHtml = msg;
            })
            // 3. Send another message port (for example, port 0) to the HTML side, which can then save the port for future use.
            this.controller.postMessage('__init_port__', [this.ports[0]], '*');
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })

      // 4. Use the port on the application side to send messages to the port that has been sent to the HTML side.
      Button('SendDataToHTML')
        .onClick(() => {
          try {
            if (this.ports && this.ports[1]) {
              this.ports[1].postMessageEvent(this.sendFromEts);
            } else {
              console.error(`ports is null, Please initialize first`);
            }
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: $rawfile('xxx.html'), controller: this.controller })
    }
  }
}

<!--xxx.html-->
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>WebView Message Port Demo</title>
</head>

  <body>
    <h1>WebView Message Port Demo</h1>
    <div>
        <input type="button" value="SendToEts" onclick="PostMsgToEts(msgFromJS.value);"/><br/>
        <input id="msgFromJS" type="text" value="send this message from HTML to ets"/><br/>
    </div>
    <p class="output">display received message send from ets</p>
  </body>
  <script src="xxx.js"></script>
</html>

//xxx.js
var h5Port;
var output = document.querySelector('.output');
window.addEventListener('message', function (event) {
    if (event.data == '__init_port__') {
        if (event.ports[0] != null) {
            h5Port = event.ports[0]; // 1. Save the port number sent from the eTS side.
            h5Port.onmessage = function (event) {
              // 2. Receive the message sent from the eTS side.
              var msg = 'Got message from ets:';
              var result = event.data;
              if (typeof(result) == "string") {
                console.log("received string message from html5, string is:" + result);
                msg = msg + result;
              } else if (typeof(result) == "object") {
                if (result instanceof ArrayBuffer) {
                  console.log("received arraybuffer from html5, length is:" + result.byteLength);
                  msg = msg + "lenght is " + result.byteLength;
                } else {
                  console.log("not support");
                }
              } else {
                console.log("not support");
              }
              output.innerHTML = msg;
            }
        }
    }
})

// 3. Use h5Port to send messages to the eTS side.
function PostMsgToEts(data) {
    if (h5Port) {
      h5Port.postMessage(data);
    } else {
      console.error("h5Port is null, Please initialize first");
    }
}

requestFocus

requestFocus(): void

Requests focus for this web page.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('requestFocus')
        .onClick(() => {
          try {
            this.controller.requestFocus();
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        });
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

zoomIn

zoomIn(): void

Zooms in on this web page by 20%.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('zoomIn')
        .onClick(() => {
          try {
            this.controller.zoomIn();
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

zoomOut

zoomOut(): void

Zooms out of this web page by 20%.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('zoomOut')
        .onClick(() => {
          try {
            this.controller.zoomOut();
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getHitTestValue

getHitTestValue(): HitTestValue

Obtains the element information of the area being clicked.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getHitTestValue')
        .onClick(() => {
          try {
            let hitValue = this.controller.getHitTestValue();
            console.log("hitType: " + hitValue.type);
            console.log("extra: " + hitValue.extra);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getWebId

getWebId(): number

Obtains the index value of this <Web> component, which can be used for <Web> component management.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getWebId')
        .onClick(() => {
          try {
            let id = this.controller.getWebId();
            console.log("id: " + id);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getUserAgent

getUserAgent(): string

Obtains the default user agent of this web page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getUserAgent')
        .onClick(() => {
          try {
            let userAgent = this.controller.getUserAgent();
            console.log("userAgent: " + userAgent);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

You can customize the user agent based on the default user agent.

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State ua: string = ""

  aboutToAppear():void {
    web_webview.once('webInited', () => {
      try {
        // Customize the user agent on the application side.
        this.ua = this.controller.getUserAgent() + 'xxx';
      } catch(error) {
        console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
      }
    })
  }

  build() {
    Column() {
      Web({ src: 'www.example.com', controller: this.controller })
        .userAgent(this.ua)
    }
  }
}

getTitle

getTitle(): string

Obtains the title of the current web page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getTitle')
        .onClick(() => {
          try {
            let title = this.controller.getTitle();
            console.log("title: " + title);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getPageHeight

getPageHeight(): number

Obtains the height of this web page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getPageHeight')
        .onClick(() => {
          try {
            let pageHeight = this.controller.getPageHeight();
            console.log("pageHeight : " + pageHeight);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

storeWebArchive

storeWebArchive(baseName: string, autoName: boolean, callback: AsyncCallback<string>): void

Stores this web page. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('storeWebArchive')
        .onClick(() => {
          try {
            this.controller.storeWebArchive("/data/storage/el2/base/", true, (error, filename) => {
              if (error) {
                console.info(`save web archive error: ` + JSON.stringify(error))
                return;
              }
              if (filename != null) {
                console.info(`save web archive success: ${filename}`)
              }
            });
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

storeWebArchive

storeWebArchive(baseName: string, autoName: boolean): Promise<string>

Stores this web page. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('storeWebArchive')
        .onClick(() => {
          try {
            this.controller.storeWebArchive("/data/storage/el2/base/", true)
              .then(filename => {
                if (filename != null) {
                  console.info(`save web archive success: ${filename}`)
                }
              })
              .catch(error => {
                console.log('error: ' + JSON.stringify(error));
              })
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getUrl

getUrl(): string

Obtains the URL of this page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getUrl')
        .onClick(() => {
          try {
            let url = this.controller.getUrl();
            console.log("url: " + url);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

stop

stop(): void

Stops page loading.

System capability: SystemCapability.Web.Webview.Core

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('stop')
        .onClick(() => {
          try {
            this.controller.stop();
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        });
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

backOrForward

backOrForward(step: number): void

Performs a specific number of steps forward or backward on the current page based on the history stack. No redirection will be performed if the corresponding page does not exist in the history stack.

Because the previously loaded web pages are used for the operation, no page reloading is involved.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State step: number = -2;

  build() {
    Column() {
      Button('backOrForward')
        .onClick(() => {
          try {
            this.controller.backOrForward(this.step);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

scrollTo

scrollTo(x:number, y:number): void

Scrolls the page to the specified absolute position.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('scrollTo')
        .onClick(() => {
          try {
            this.controller.scrollTo(50, 50);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

<!--xxx.html-->
<!DOCTYPE html>
<html>
<head>
    <title>Demo</title>
    <style>
        body {
            width:3000px;
            height:3000px;
            padding-right:170px;
            padding-left:170px;
            border:5px solid blueviolet
        }
    </style>
</head>
<body>
Scroll Test
</body>
</html>

scrollBy

scrollBy(deltaX:number, deltaY:number): void

Scrolls the page by the specified amount.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('scrollBy')
        .onClick(() => {
          try {
            this.controller.scrollBy(50, 50);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

<!--xxx.html-->
<!DOCTYPE html>
<html>
<head>
    <title>Demo</title>
    <style>
        body {
            width:3000px;
            height:3000px;
            padding-right:170px;
            padding-left:170px;
            border:5px solid blueviolet
        }
    </style>
</head>
<body>
Scroll Test
</body>
</html>

slideScroll

slideScroll(vx:number, vy:number): void

Simulates a slide-to-scroll action on the page at the specified velocity.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('slideScroll')
        .onClick(() => {
          try {
            this.controller.slideScroll(500, 500);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

<!--xxx.html-->
<!DOCTYPE html>
<html>
<head>
    <title>Demo</title>
    <style>
        body {
            width:3000px;
            height:3000px;
            padding-right:170px;
            padding-left:170px;
            border:5px solid blueviolet
        }
    </style>
</head>
<body>
Scroll Test
</body>
</html>

getOriginalUrl

getOriginalUrl(): string

Obtains the original URL of this page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getOrgUrl')
        .onClick(() => {
          try {
            let url = this.controller.getOriginalUrl();
            console.log("original url: " + url);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getFavicon

getFavicon(): image.PixelMap

Obtains the favicon of this page.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';
import image from "@ohos.multimedia.image"
@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State pixelmap: image.PixelMap = undefined;

  build() {
    Column() {
      Button('getFavicon')
        .onClick(() => {
          try {
            this.pixelmap = this.controller.getFavicon();
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

setNetworkAvailable

setNetworkAvailable(enable: boolean): void

Sets the window.navigator.onLine attribute in JavaScript.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('setNetworkAvailable')
        .onClick(() => {
          try {
            this.controller.setNetworkAvailable(true);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

hasImage

hasImage(callback: AsyncCallback<boolean>): void

Checks whether this page contains images. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('hasImageCb')
        .onClick(() => {
          try {
            this.controller.hasImage((error, data) => {
              if (error) {
                console.info(`hasImage error: ` + JSON.stringify(error))
                return;
              }
              console.info("hasImage: " + data);
            });
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

hasImage

hasImage(): Promise<boolean>

Checks whether this page contains images. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('hasImagePm')
        .onClick(() => {
          try {
            this.controller.hasImage().then((data) => {
              console.info('hasImage: ' + data);
            })
            .catch(function (error) {
              console.error("error: " + error);
            })
          } catch (error) {
            console.error(`Errorcode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

removeCache

removeCache(clearRom: boolean): void

Clears the cache in the application. This API will clear the cache for all webviews in the same application.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('removeCache')
        .onClick(() => {
          try {
            this.controller.removeCache(false);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

pageUp

pageUp(top:boolean): void

Scrolls the page up by half the view port or jumps to the top of the page.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('pageUp')
        .onClick(() => {
          try {
            this.controller.pageUp(false);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

pageDown

pageDown(bottom:boolean): void

Scrolls the page down by half the view port or jumps to the bottom of the page.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('pageDown')
        .onClick(() => {
          try {
            this.controller.pageDown(false);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getBackForwardEntries

getBackForwardEntries(): BackForwardList

Obtains the historical information list of the current webview.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getBackForwardEntries')
        .onClick(() => {
          try {
            let list = this.controller.getBackForwardEntries()
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

serializeWebState

serializeWebState(): Uint8Array

Serializes the page status history of the current Webview.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

1. To perform operations on files, you must import the file management module. For details, see File Management.

// xxx.ets
import web_webview from '@ohos.web.webview';
import fs from '@ohos.file.fs';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('serializeWebState')
        .onClick(() => {
          try {
            let state = this.controller.serializeWebState();
            // Obtain the value of globalThis.cacheDir from MainAbility.ts.
            let path = globalThis.cacheDir;
            path += '/WebState';
            // Synchronously open a file.
            let file = fs.openSync(path, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
            fs.writeSync(file.fd, state.buffer);
            fs.closeSync(file.fd);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

2. Modify MainAbility.ts. Obtain the path of the application cache file.

// xxx.ts
import UIAbility from '@ohos.app.ability.UIAbility';
import web_webview from '@ohos.web.webview';

export default class MainAbility extends UIAbility {
    onCreate(want, launchParam) {
        // Bind cacheDir to the globalThis object to implement data synchronization between the UIAbility component and the page.
        globalThis.cacheDir = this.context.cacheDir;
    }
}

restoreWebState

restoreWebState(state: Uint8Array): void

Restores the page status history from the serialized data of the current WebView.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

1. To perform operations on files, you must import the file management module. For details, see File Management.

// xxx.ets
import web_webview from '@ohos.web.webview';
import fs from '@ohos.file.fs';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('RestoreWebState')
        .onClick(() => {
          try {
            // Obtain the value of globalThis.cacheDir from MainAbility.ts.
            let path = globalThis.cacheDir;
            path += '/WebState';
            // Synchronously open a file.
            let file = fs.openSync(path, fs.OpenMode.READ_WRITE);
            let stat = fs.statSync(path);
            let size = stat.size;
            let buf = new ArrayBuffer(size);
            fs.read(file.fd, buf, (err, readLen) => {
              if (err) {
                console.info("mkdir failed with error message: " + err.message + ", error code: " + err.code);
              } else {
                console.info("read file data succeed");
                this.controller.restoreWebState(new Uint8Array(buf.slice(0, readLen)));
                fs.closeSync(file);
              }
            });
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

2. Modify MainAbility.ts. Obtain the path of the application cache file.

// xxx.ts
import UIAbility from '@ohos.app.ability.UIAbility';
import web_webview from '@ohos.web.webview';

export default class MainAbility extends UIAbility {
    onCreate(want, launchParam) {
        // Bind cacheDir to the globalThis object to implement data synchronization between the UIAbility component and the page.
        globalThis.cacheDir = this.context.cacheDir;
    }
}

customizeSchemes

static customizeSchemes(schemes: Array<WebCustomScheme>): void

Customizes the URL schemes (also known as protocols). It is recommended that this API be called before any <Web> component is initialized.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  responseweb: WebResourceResponse = new WebResourceResponse()
  scheme1: web_webview.WebCustomScheme = {schemeName: "name1", isSupportCORS: true, isSupportFetch: true}
  scheme2: web_webview.WebCustomScheme = {schemeName: "name2", isSupportCORS: true, isSupportFetch: true}
  scheme3: web_webview.WebCustomScheme = {schemeName: "name3", isSupportCORS: true, isSupportFetch: true}

  aboutToAppear():void {
    try {
      web_webview.WebviewController.customizeSchemes([this.scheme1, this.scheme2, this.scheme3])
    } catch(error) {
      console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
    }
  }

  build() {
    Column() {
      Web({ src: 'www.example.com', controller: this.controller })
        .onInterceptRequest((event) => {
          console.log('url:' + event.request.getRequestUrl())
          return this.responseweb
        })
    }
  }
}

WebCookieManager

Implements a WebCookieManager instance to manage behavior of cookies in <Web> components. All <Web> components in an application share a WebCookieManager instance.

getCookie

static getCookie(url: string): string

Obtains the cookie corresponding to the specified URL.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getCookie')
        .onClick(() => {
          try {
            let value = web_webview.WebCookieManager.getCookie('https://www.example.com');
            console.log("value: " + value);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

setCookie

static setCookie(url: string, value: string): void

Sets a cookie for the specified URL.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('setCookie')
        .onClick(() => {
          try {
            web_webview.WebCookieManager.setCookie('https://www.example.com', 'a=b');
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

saveCookieAsync

static saveCookieAsync(callback: AsyncCallback<void>): void

Saves the cookies in the memory to the drive. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('saveCookieAsync')
        .onClick(() => {
          try {
            web_webview.WebCookieManager.saveCookieAsync((error) => {
              if (error) {
                console.log("error: " + error);
              }
            })
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

saveCookieAsync

static saveCookieAsync(): Promise<void>

Saves the cookies in the memory to the drive. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('saveCookieAsync')
        .onClick(() => {
          try {
            web_webview.WebCookieManager.saveCookieAsync()
              .then(() => {
                console.log("saveCookieAsyncCallback success!");
              })
              .catch((error) => {
                console.error("error: " + error);
              });
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

putAcceptCookieEnabled

static putAcceptCookieEnabled(accept: boolean): void

Sets whether the WebCookieManager instance has the permission to send and receive cookies.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('putAcceptCookieEnabled')
        .onClick(() => {
          try {
            web_webview.WebCookieManager.putAcceptCookieEnabled(false);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

isCookieAllowed

static isCookieAllowed(): boolean

Checks whether the WebCookieManager instance has the permission to send and receive cookies.

System capability: SystemCapability.Web.Webview.Core

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('isCookieAllowed')
        .onClick(() => {
          let result = web_webview.WebCookieManager.isCookieAllowed();
          console.log("result: " + result);
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

putAcceptThirdPartyCookieEnabled

static putAcceptThirdPartyCookieEnabled(accept: boolean): void

Sets whether the WebCookieManager instance has the permission to send and receive third-party cookies.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('putAcceptThirdPartyCookieEnabled')
        .onClick(() => {
          try {
            web_webview.WebCookieManager.putAcceptThirdPartyCookieEnabled(false);
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

isThirdPartyCookieAllowed

static isThirdPartyCookieAllowed(): boolean

Checks whether the WebCookieManager instance has the permission to send and receive third-party cookies.

System capability: SystemCapability.Web.Webview.Core

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('isThirdPartyCookieAllowed')
        .onClick(() => {
          let result = web_webview.WebCookieManager.isThirdPartyCookieAllowed();
          console.log("result: " + result);
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

existCookie

static existCookie(): boolean

Checks whether cookies exist.

System capability: SystemCapability.Web.Webview.Core

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('existCookie')
        .onClick(() => {
          let result = web_webview.WebCookieManager.existCookie();
          console.log("result: " + result);
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

deleteEntireCookie

static deleteEntireCookie(): void

Deletes all cookies.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('deleteEntireCookie')
        .onClick(() => {
          web_webview.WebCookieManager.deleteEntireCookie();
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

deleteSessionCookie

static deleteSessionCookie(): void

Deletes all session cookies.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
import web_webview from '@ohos.web.webview'

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('deleteSessionCookie')
        .onClick(() => {
          web_webview.WebCookieManager.deleteSessionCookie();
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

WebStorage

Implements a WebStorage object to manage the Web SQL database and HTML5 Web Storage APIs. All <Web> components in an application share a WebStorage object.

deleteOrigin

static deleteOrigin(origin : string): void

Deletes all data in the specified origin.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('deleteOrigin')
        .onClick(() => {
          try {
            web_webview.WebStorage.deleteOrigin(this.origin);
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }

        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

getOrigins

static getOrigins(callback: AsyncCallback<Array<WebStorageOrigin>>) : void

Obtains information about all origins that are currently using the Web SQL Database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getOrigins')
        .onClick(() => {
          try {
            web_webview.WebStorage.getOrigins((error, origins) => {
              if (error) {
                console.log('error: ' + JSON.stringify(error));
                return;
              }
              for (let i = 0; i < origins.length; i++) {
                console.log('origin: ' + origins[i].origin);
                console.log('usage: ' + origins[i].usage);
                console.log('quota: ' + origins[i].quota);
              }
            })
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }

        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

getOrigins

static getOrigins() : Promise<Array<WebStorageOrigin>>

Obtains information about all origins that are currently using the Web SQL Database. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getOrigins')
        .onClick(() => {
          try {
            web_webview.WebStorage.getOrigins()
              .then(origins => {
                for (let i = 0; i < origins.length; i++) {
                  console.log('origin: ' + origins[i].origin);
                  console.log('usage: ' + origins[i].usage);
                  console.log('quota: ' + origins[i].quota);
                }
              })
              .catch(e => {
                console.log('error: ' + JSON.stringify(e));
              })
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }

        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

getOriginQuota

static getOriginQuota(origin : string, callback : AsyncCallback<number>) : void

Obtains the storage quota of an origin in the Web SQL Database, in bytes. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('getOriginQuota')
        .onClick(() => {
          try {
            web_webview.WebStorage.getOriginQuota(this.origin, (error, quota) => {
              if (error) {
                console.log('error: ' + JSON.stringify(error));
                return;
              }
              console.log('quota: ' + quota);
            })
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }

        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

getOriginQuota

static getOriginQuota(origin : string) : Promise<number>

Obtains the storage quota of an origin in the Web SQL Database, in bytes. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('getOriginQuota')
        .onClick(() => {
          try {
            web_webview.WebStorage.getOriginQuota(this.origin)
              .then(quota => {
                console.log('quota: ' + quota);
              })
              .catch(e => {
                console.log('error: ' + JSON.stringify(e));
              })
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }

        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

getOriginUsage

static getOriginUsage(origin : string, callback : AsyncCallback<number>) : void

Obtains the storage usage of an origin in the Web SQL Database, in bytes. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('getOriginUsage')
        .onClick(() => {
          try {
            web_webview.WebStorage.getOriginUsage(this.origin, (error, usage) => {
              if (error) {
                console.log('error: ' + JSON.stringify(error));
                return;
              }
              console.log('usage: ' + usage);
            })
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }

        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

getOriginUsage

static getOriginUsage(origin : string) : Promise<number>

Obtains the storage usage of an origin in the Web SQL Database, in bytes. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('getOriginUsage')
        .onClick(() => {
          try {
            web_webview.WebStorage.getOriginUsage(this.origin)
              .then(usage => {
                console.log('usage: ' + usage);
              })
              .catch(e => {
                console.log('error: ' + JSON.stringify(e));
              })
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }

        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

deleteAllData

static deleteAllData(): void

Deletes all data in the Web SQL Database.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('deleteAllData')
        .onClick(() => {
          try {
            web_webview.WebStorage.deleteAllData();
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
        .databaseAccess(true)
    }
  }
}

WebDataBase

Implements a WebDataBase object.

getHttpAuthCredentials

static getHttpAuthCredentials(host: string, realm: string): Array<string>

Retrieves HTTP authentication credentials for a given host and realm. This API returns the result synchronously.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  host: string = "www.spincast.org";
  realm: string = "protected example";
  username_password: string[];

  build() {
    Column() {
      Button('getHttpAuthCredentials')
        .onClick(() => {
          try {
            this.username_password = web_webview.WebDataBase.getHttpAuthCredentials(this.host, this.realm);
            console.log('num: ' + this.username_password.length);
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

saveHttpAuthCredentials

static saveHttpAuthCredentials(host: string, realm: string, username: string, password: string): void

Saves HTTP authentication credentials for a given host and realm. This API returns the result synchronously.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  host: string = "www.spincast.org";
  realm: string = "protected example";

  build() {
    Column() {
      Button('saveHttpAuthCredentials')
        .onClick(() => {
          try {
            web_webview.WebDataBase.saveHttpAuthCredentials(this.host, this.realm, "Stromgol", "Laroche");
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

existHttpAuthCredentials

static existHttpAuthCredentials(): boolean

Checks whether any saved HTTP authentication credentials exist. This API returns the result synchronously.

System capability: SystemCapability.Web.Webview.Core

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('existHttpAuthCredentials')
        .onClick(() => {
          try {
            let result = web_webview.WebDataBase.existHttpAuthCredentials();
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

deleteHttpAuthCredentials

static deleteHttpAuthCredentials(): void

Deletes all HTTP authentication credentials saved in the cache. This API returns the result synchronously.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('deleteHttpAuthCredentials')
        .onClick(() => {
          try {
            web_webview.WebDataBase.deleteHttpAuthCredentials();
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

GeolocationPermissions

Implements a GeolocationPermissions object.

Required Permissions

ohos.permission.LOCATION, ohos.permission.APPROXIMATELY_LOCATION, and ohos.permission.LOCATION_IN_BACKGROUND, which are required for accessing the location information. For details about the permissions, see @ohos.geolocation (Geolocation).

allowGeolocation

static allowGeolocation(origin: string): void

Allows the specified origin to use the geolocation information.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('allowGeolocation')
        .onClick(() => {
          try {
            web_webview.GeolocationPermissions.allowGeolocation(this.origin);
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

deleteGeolocation

static deleteGeolocation(origin: string): void

Clears the geolocation permission status of a specified origin.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('deleteGeolocation')
        .onClick(() => {
          try {
            web_webview.GeolocationPermissions.deleteGeolocation(this.origin);
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getAccessibleGeolocation

static getAccessibleGeolocation(origin: string, callback: AsyncCallback<boolean>): void

Obtains the geolocation permission status of the specified origin. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('getAccessibleGeolocation')
        .onClick(() => {
          try {
            web_webview.GeolocationPermissions.getAccessibleGeolocation(this.origin, (error, result) => {
              if (error) {
                console.log('getAccessibleGeolocationAsync error: ' + JSON.stringify(error));
                return;
              }
              console.log('getAccessibleGeolocationAsync result: ' + result);
            });
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getAccessibleGeolocation

static getAccessibleGeolocation(origin: string): Promise<boolean>

Obtains the geolocation permission status of the specified origin. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Error codes

For details about the error codes, see Webview Error Codes.

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  origin: string = "file:///";

  build() {
    Column() {
      Button('getAccessibleGeolocation')
        .onClick(() => {
          try {
            web_webview.GeolocationPermissions.getAccessibleGeolocation(this.origin)
              .then(result => {
                console.log('getAccessibleGeolocationPromise result: ' + result);
              }).catch(error => {
              console.log('getAccessibleGeolocationPromise error: ' + JSON.stringify(error));
            });
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getStoredGeolocation

static getStoredGeolocation(callback: AsyncCallback<Array<string>>): void

Obtains the geolocation permission status of all origins. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Web.Webview.Core

Parameters

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getStoredGeolocation')
        .onClick(() => {
          try {
            web_webview.GeolocationPermissions.getStoredGeolocation((error, origins) => {
              if (error) {
                console.log('getStoredGeolocationAsync error: ' + JSON.stringify(error));
                return;
              }
              let origins_str: string = origins.join();
              console.log('getStoredGeolocationAsync origins: ' + origins_str);
            });
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getStoredGeolocation

static getStoredGeolocation(): Promise<Array<string>>

Obtains the geolocation permission status of all origins. This API uses a promise to return the result.

System capability: SystemCapability.Web.Webview.Core

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('getStoredGeolocation')
        .onClick(() => {
          try {
            web_webview.GeolocationPermissions.getStoredGeolocation()
              .then(origins => {
                let origins_str: string = origins.join();
                console.log('getStoredGeolocationPromise origins: ' + origins_str);
              }).catch(error => {
              console.log('getStoredGeolocationPromise error: ' + JSON.stringify(error));
            });
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

deleteAllGeolocation

static deleteAllGeolocation(): void

Clears the geolocation permission status of all sources.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
import web_webview from '@ohos.web.webview';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Button('deleteAllGeolocation')
        .onClick(() => {
          try {
            web_webview.GeolocationPermissions.deleteAllGeolocation();
          } catch (error) {
            console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

WebHeader

Describes the request/response header returned by the <Web> component.

System capability: SystemCapability.Web.Webview.Core

WebHitTestType

System capability: SystemCapability.Web.Webview.Core

HitTestValue

Provides the element information of the area being clicked. For details about the sample code, see getHitTestValue.

System capability: SystemCapability.Web.Webview.Core

WebMessage

Describes the data types supported for WebMessagePort.

System capability: SystemCapability.Web.Webview.Core

WebStorageOrigin

Provides usage information of the Web SQL Database.

System capability: SystemCapability.Web.Webview.Core

BackForwardList

Provides the historical information list of the current webview.

System capability: SystemCapability.Web.Webview.Core

getItemAtIndex

getItemAtIndex(index: number): HistoryItem

Obtains the page record with the specified index in the history stack.

System capability: SystemCapability.Web.Webview.Core

Parameters

Return value

Example

// xxx.ets
import web_webview from '@ohos.web.webview';
import image from "@ohos.multimedia.image"

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State icon: image.PixelMap = undefined;

  build() {
    Column() {
      Button('getBackForwardEntries')
        .onClick(() => {
          try {
            let list = this.controller.getBackForwardEntries();
            let historyItem = list.getItemAtIndex(list.currentIndex);
            console.log("HistoryItem: " + JSON.stringify(historyItem));
            this.icon = historyItem.icon;
          } catch (error) {
            console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
          }
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

HistoryItem

Describes a historical page record.

System capability: SystemCapability.Web.Webview.Core

WebCustomScheme

Defines a custom URL scheme.

System capability: SystemCapability.Web.Webview.Core