Invoking Frontend Page Functions on the Application

You can call runJavaScript() on an application to call JavaScript functions of frontend pages.

In the following example, when a user clicks the runJavaScript button on the application, the htmlTest() API of the frontend page will be triggered.

Frontend page code:

<!-- index.html -->
<!DOCTYPE html>
<html>
<body>
<script>
    function htmlTest() {
        console.info('JavaScript Hello World! ');
    }
</script>
</body>
</html>

Application code:

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

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

  build() {
    Column() {
      Web({ src: $rawfile('index.html'), controller: this.webviewController})
      Button('runJavaScript')
        .onClick(() => {
           this.webviewController.runJavaScript('htmlTest()');
        })
    }
  }
}