Greasy Fork

visibilityChangeListener

Waits until the tab is focused, executing a callback function when it happens.

目前为 2023-11-20 提交的版本。查看 最新版本。

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.greasyfork.cloud/scripts/480373/1283353/visibilityChangeListener.js 

// ==UserScript==
// @name         visibilityChangeListener
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Waits until the tab is focused, executing a callback function when it happens.
// @author       IgnaV
// @grant        none
// ==/UserScript==

const visibilityChangeListener = (onFocus, onBlur) => {
    document.addEventListener('visibilitychange', function() {
        if (document.visibilityState === 'visible') {
            onFocus?.();
        } else {
            onBlur?.();
        }
    });
};