注意：要引入jquery
可以直接使用弹框播放iframe
一、创建 index.html
<!DOCTYPE html>
<html><head><meta charset="utf-8"><title></title><style>.modal {/* 默认隐藏 */display: none;position: fixed;z-index: 99999;left: 0;top: 0;width: 100%;height: 100%;background-color: rgba(3, 3, 3, .8);}.close-btn {/* 关闭按钮 */position: absolute; z-index: 100; right: 10px; top: -30px; font-size: 18px; color: #fff;text-align: center;cursor: pointer;}/* 弹窗内容 */.modal-content {position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);padding: 13px 9px;width: 100%; /* 这个要先去掉，手机端时在加上 */display: flex;justify-content: center;align-items: center;}.iframe{position: relative;padding-bottom: 56.25%;height: 0;overflow: hidden;}.iframe iframe {position: absolute;top: 0;left: 0;width: 100%;height: 100%;}.iframe-width{/* PC */position: absolute; left:50%; transform: translateX(-50%); width: 900px;}@media (max-width: 900px){/* 移动 */.iframe-width{/* position: absolute; top:50%; left:0; transform: translateY(-50%); margin: unset; */width: 100%;}}</style></head><body><div onclick="videoIframe()" style="color: blue;">打开弹框看iframe视频</div><div id="myModal" class="modal"><div class="modal-content"><div id="iframeFuDiv" class="iframe-width"><span class="close-btn">关闭</span><div class="modal-content-div"></div></div></div></div><script src="jquery-2.2.0.min.js"></script><script src="index.js"></script></body>
</html>
二、创建 index.js
window.onload = function(){// 打开弹框（ class="open-btn" ）$(document).delegate('.open-btn','click',function(e){document.getElementById("myModal").style.display = "block"; })// 关闭弹框（ class="close-btn" ）$(document).delegate('.close-btn','click',function(e){ document.getElementById("myModal").style.display = "none"; $(".modal-content-div").html('') // 关闭后清除视频})// 点击空白区域关闭弹框const myModal = document.getElementById('myModal');myModal.addEventListener('click', function(event) {if (event.target === myModal) { myModal.style.display = 'none' $(".modal-content-div").html('') // 关闭后清除视频}});
}// iframe视频弹框播放
function videoIframe(){let videoUrl = '//player.bilibili.com/player.html?isOutside=true&aid=113331050385027&bvid=BV144CDYzESY&cid=26355240647&p=1'let html = `<iframe id="videoIframe" height="506" width="900" src="${videoUrl}" frameborder=0 allowfullscreen></iframe>`$(".modal-content-div").html(html)// 这个需要加上$('iframe').wrap('<div class="iframe"></div>')document.getElementById("myModal").style.display = "block"
}
参考链接：
格林威治：网站引入iframe视频，如何实现宽度高度自适应?
https://www.cnblogs.com/zsmj001/p/17210837.html