Console

The console module provides a simple debugging console, which is similar to the JavaScript console provided by the browser.

NOTE

The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.

console.debug

debug(message: string, ...arguments: any[]): void

Prints debugging information in formatted output mode.

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

Example

const number = 5;
console.debug('count: %d', number);  // Print the debugging information with arguments in the message replaced.
// count: 5 
console.debug('count:', number);  // Print the message and other information.
// count: 5 
console.debug('count:'); // Print the message only.
// count: 

console.log

log(message: string, ...arguments: any[]): void

Prints log information in formatted output mode.

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

Example

const number = 5;
console.log('count: %d', number);  // Print the log information with arguments in the message replaced.
// count: 5 
console.log('count:', number);  // Print the message and other information.
// count: 5 
console.log('count:'); // Print the message only.
// count: 

console.info

info(message: string, ...arguments: any[]): void

Prints log information in formatted output mode. This API is the alias of console.log ().

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

Example

const number = 5;
console.info('count: %d', number);  // Print the log information with arguments in the message replaced.
// count: 5 
console.info('count:', number);  // Print the message and other information.
// count: 5 
console.info('count:'); // Print the message only.
// count: 

console.warn

warn(message: string, ...arguments: any[]): void

Prints warning information in formatted output mode.

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

Example

const str = "name should be string";
console.warn('warn: %d', str); // Print the warning information with arguments in the message replaced.
// warn: name should be string
console.warn('warn:', str);  // Print the message and other information.
// warn: name should be string
console.warn('warn:'); // Print the message only.
// warn: 

console.error

error(message: string, ...arguments: any[]): void

Prints error information in formatted output mode.

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

Example

const str = "value is not defined";
console.error('error: %d', str);  // Print the error information with arguments in the message replaced.
// error: value is not defined
console.error('error:', str);  // Print the message and other information.
// error: value is not defined
console.error('error:'); // Print the message only.
// error: