查看“︁MediaWiki:Common.js”︁的源代码

/* 这里的任何JavaScript将为所有用户在每次页面加载时加载。 */
if (mw.config.get('wgPageName') === '首页') {
	var event = new KeyboardEvent('keydown', {
		key: '/',
		keyCode: 65,
		which: 65,
		ctrlKey: false,
		altKey: false,
		shiftKey: false,
		metaKey: false
	});

	var skin_search = document.getElementById('skin-citizen-search-trigger');
	// 添加点击事件监听器
	skin_search.addEventListener('click', function() {
		document.dispatchEvent(event); //执行
	});

	$(function() {
		/* 头图 */
		var mwBody = document.getElementById('content');
		var newDiv = document.createElement('div');
		newDiv.setAttribute('class', 'header-image');
		newDiv.innerHTML = '<div class="header-image" style="background-image: linear-gradient(to top, var(--color-surface-0), transparent 50%), url(https://galbaike.com/images/2/26/%E9%A6%96%E9%A1%B5%E5%A4%B4%E5%9B%BE3.png);background-size: cover;background-position: top;height: 36vh;margin-bottom: -37vh;"></div>';
		mwBody.parentNode.insertBefore(newDiv, mwBody);

	}())

}

if ($('.bvideo').length > 0) {
    var dataIdValue = $('.bvideo').data('id');
    console.log('目标<div>存在，可以执行相关操作'+dataIdValue );
}