html 代码 <p id="demo"></p>

 <button @click="myFunction('https://vd3.bdstatic.com/mda-nerfsvgshsy71kge/sc/cae_h264/1653565467811258541/mda-nerfsvgshsy71kge.mp4?v_from_s=hkapp-haokan-nanjing&auth_key=1653574971-0-0-070cded1cabf9e8b2eb1dfc974e0033f&bcevod_channel=searchbox_feed&pd=1&cd=0&pt=3&logid=3171249120&vid=8038329417376972164&abtest=101830_2-102148_2-17451_2-3000232_1-3000233_3&klogid=3171249120')">试一下</button>  或者 <button onclick="myFunction('https://vd3.bdstatic.com/mda-nerfsvgshsy71kge/sc/cae_h264/1653565467811258541/mda-nerfsvgshsy71kge.mp4?v_from_s=hkapp-haokan-nanjing&auth_key=1653574971-0-0-070cded1cabf9e8b2eb1dfc974e0033f&bcevod_channel=searchbox_feed&pd=1&cd=0&pt=3&logid=3171249120&vid=8038329417376972164&abtest=101830_2-102148_2-17451_2-3000232_1-3000233_3&klogid=3171249120')">试一下</button> 

script 代码

function myFunction(url) {         console.log("123");         var x = document.createElement("video");         console.log(x);         // 'video-js'         x.classList.add('vjs-default-skin', 'vjs-big-play-centered');         x.setAttribute("width", "100%");         x.setAttribute("height", "220px");         x.setAttribute("controls", "controls");         x.setAttribute("preload", "auto");         x.setAttribute(":poster", "posterImg");         x.setAttribute("src", url);         // document.getElementById("demo").innerHTML = "您应该在 video 元素中使用 source 元素。";         document.getElementById('demo').appendChild(x);     }