Why Do Scripts Fail After Pressing Firefox\'s Back Button?-JS Tutorial-php.cn

Why Do Scripts Fail After Pressing Firefox\'s Back Button?

Mary-Kate Olsen

Release： 2024-10-22 19:45:58

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Why Do Scripts Fail After Pressing Firefox's Back Button?

Scripts Failing to Execute After Using Firefox History Back Button

In Firefox, navigating back to previously visited web pages using the back button can result in scripts on those pages failing to run a second time. This behavior is not observed in other browsers like Google Chrome or Internet Explorer.

Fix/Workaround

To address this issue, you can utilize the following fix:

Set an Empty Function to window.onunload

Add the following line to your web page before the closing tag:

<code class="javascript">window.onunload = function(){};</code>

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Example:

<code class="html"><html>
<body>
<script type="text/javascript">
  window.onload = function() { alert('window.onload alert'); };
  window.onunload = function(){};
  alert('inline alert');
</script>
<a href="1.html">Click Me!</a>
</body>
</html></code>

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This workaround sets an empty function to be called when the page unloads. It essentially clears the browser's cache, allowing the scripts to run again when the page is visited for the second time.

Source:

http://www.firefoxanswer.com/firefox/672-firefoxanswer.html (Archived Version)

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