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<!DOCTYPE html> <html> <body onpageshow="myFunction(event)"> <h1>Hello World!</h1> <p><strong>注意：</strong> Internet Explorer 10 及更早版本不支持 onpageshow 事件和持久化属性。</p> <script> function myFunction(event) { if (event.persisted) { alert("该页面已被浏览器缓存"); } else { alert("该页面未被浏览器缓存"); } } </script> </body> </html>