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<!DOCTYPE html> <html> <body> <p>本示例使用 addEventListener() 方法将“load”事件附加到 iframe 元素。</p> <iframe id="myFrame" src="/default.asp"></iframe> <p id="demo"></p> <script> document.getElementById("myFrame").addEventListener("load", myFunction); function myFunction() { document.getElementById("demo").innerHTML = "iframe 已加载。"; } </script> </body> </html>