How to Prevent Stale Data When Using the Back Button in Single-Page Applications?

Refresh Page on Back Button Click

Navigating using the back button can often lead to unintended behavior, especially when using .htaccess to route traffic to a single page. The issue arises because the back button operates by retrieving the cached version of the page, resulting in stale data.

To address this, let's explore alternative solutions:

Timestamped Page

Create a new PHP file that displays a timestamp. This will allow you to identify when the page has been refreshed:

<code class="php"><?php header("Cache-Control: no-store, must-revalidate, max-age=0");
header("Pragma: no-cache");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
echo time();
?>
<a href="http://google.com">aaaaa</a></code>

This approach ensures that the page is always reloaded when using the back button.

Hidden Field Backup

Another solution involves creating a hidden form field that stores the current state of dynamically created elements. Upon page load, this field can be used to restore the elements:

<code class="html"><input type="hidden" id="refreshed" value="no">
<script type="text/javascript">
onload=function(){
var e=document.getElementById("refreshed");
if(e.value=="no")e.value="yes";
else{e.value="no";location.reload();}
}
</script></code>

This approach maintains the state of the page even after using the back button.

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