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<!DOCTYPE html> <html> <body> <h1>Document 对象</h1> <h2>scripts 属性</h2> <script id="myFirstScript"> document.write("Hello World!"); </script> <p>显示每个脚本元素的 id：</p> <p id="demo"></p> <script id="mySecondScript"> const collection = document.scripts; let text = ""; for (let i = 0; i < collection.length; i++) { text += collection[i].id + "<br>"; } document.getElementById("demo").innerHTML = text; </script> </body> </html>