Simple WaitForKeyElement

Library that Exports my simplified vanilla JS version of WaitForKeyElement, which is a simple async function that returns a Promise that resolves to an element by a given selector, when that element is found

目前為 2024-10-01 提交的版本，檢視最新版本。

此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.cn-greasyfork.org/scripts/511024/1457619/Simple%20WaitForKeyElement.js

發表問題、評論、或檢舉該腳本。

換行

// ==UserScript==
// @name        Simple WaitForKeyElement
// @license     MIT
// @namespace   1N07
// @match       *://*/*
// @version     1.0
// @author      1N07
// @description Library that Exports my simplified vanilla JS version of WaitForKeyElement, which is a simple async function that returns a Promise that resolves to an element by a given selector, when that element is found
// ==/UserScript==

async function WaitForKeyElement(selector, timeout) {
	return new Promise((resolve, reject) => {
		let el = document.querySelector(selector);

		if (el) {
			resolve(el);
			return;
		}

		new MutationObserver((mutationRecords, observer) => {
			el = document.querySelector(selector);
			if (el) {
				resolve(el);
				observer.disconnect();
			}
		}).observe(document.documentElement, { childList: true, subtree: true });

		if (timeout) {
			setTimeout(() => {
				reject(null);
			}, timeout);
		}
	});
}