<html><body><p><del id="myDel" datetime="2023-02-09T00:19:30Z">这段文字已被删除。</del></p><p>单击该按钮可更改已删除文本的 datetime 属性的值。</p><button onclick="myFunction()">试一试</button><p id="demo"></p><script>function myFunction() { document.getElementById("myDel").dateTime = "2023-02-10T12:30:59Z"; document.getElementById("demo").innerHTML = "dateTime 属性的值已更改为 “2023-02-10T12:30:59Z”。";}</script></body></html>