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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> </head> <body onpageshow="myFunction(event)"> <h1>Hello World!</h1> <script> function myFunction(event) { alert("页面是否从浏览器缓存中加载? " + event.persisted); } </script> </body> </html>