harmony 鸿蒙ErrorObserver

2022-12-22
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ErrorObserver

The ErrorObserver module defines an observer to listen for application errors. It can be used as an input parameter in ErrorManager.on to listen for errors that occur in the current application.

NOTE

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

Modules to Import

import errorManager from '@ohos.app.ability.errorManager';

ErrorObserver.onUnhandledException

onUnhandledException(errMsg: string): void;

Called when an unhandled exception occurs in the JS runtime.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Name	Type	Mandatory	Description
errMsg	string	Yes	Message and error stack trace about the exception.

Example

import errorManager from '@ohos.app.ability.errorManager';

let observer: errorManager.ErrorObserver = {
  onUnhandledException(errorMsg) {
    console.error('onUnhandledException, errorMsg: ', errorMsg);
  }
};

try {
    errorManager.on('error', observer);
} catch (error) {
    console.error('registerErrorObserver failed, error.code: ${error.code}, error.message: ${error.message}');
}

ErrorObserver.onException¹⁰⁺

onException?(errObject: Error): void;

Called when an exception occurs during the application running.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Name	Type	Mandatory	Description
errObject	Error	Yes	Event name, message, and error stack of the exception.

Example

import errorManager from '@ohos.app.ability.errorManager';

let observer: errorManager.ErrorObserver = {
  onUnhandledException(errorMsg) {
    console.error('onUnhandledException, errorMsg: ', errorMsg);
  },
  onException(errorObj) {
    console.log('onException, name: ', errorObj.name);
    console.log('onException, message: ', errorObj.message);
    if (typeof(errorObj.stack) === 'string') {
        console.log('onException, stack: ', errorObj.stack);
    }
  }
};

try {
    errorManager.on('error', observer);
} catch (error) {
    console.error('registerErrorObserver failed, error.code: ${error.code}, error.message: ${error.message}');
}