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<!DOCTYPE html> <html> <body onclick="myFunction(event)"> <p>单击此文档中的任何元素，找出哪个元素触发了 onclick 事件。</p> <h1>这是一个标题</h1> <button>这是一个按钮</button> <p id="demo"></p> <script> function myFunction(event) { var x = event.target; document.getElementById("demo").innerHTML = "Triggered by a " + x.tagName + " element"; } </script> </body> </html>