harmony 鸿蒙LoopObserver

2025-06-12
浏览 (4)

LoopObserver

The LoopObserver module defines an observer to listen for event processing timeout. It can be used as an input parameter in ErrorManager.on to listen for the event processing timeout of the current application’s main thread.

NOTE

The initial APIs of this module are supported since API version 12. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import { errorManager } from '@kit.AbilityKit';

LoopObserver.onLoopTimeOut

onLoopTimeOut?(timeout: number): void

Called when a timeout occurs for the main thread to process an event in the JS runtime.

Atomic service API: This API can be used in atomic services since API version 12.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Name	Type	Mandatory	Description
timeout	number	Yes	Actual execution time of the main thread.

Example

import { errorManager } from '@kit.AbilityKit';

let observer: errorManager.LoopObserver = {
  onLoopTimeOut(timeout: number) {
    console.log('Duration timeout: ' + timeout);
  }
};

errorManager.on("loopObserver", 1, observer);