: Prevent form resubmit after Browser Back button click In the early days of the web it was a problem that clicking the browser's Back button after clicking Submit could cause the form to be

In the early days of the web it was a problem that clicking the browser's Back button after clicking Submit could cause the form to be resubmitted so one might, for instance, end up with a double purchase.

This does not seem to be a problem any longer. How was it fixed? Do individual sites have to work around this or did browsers change?

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Posted in: #Browsers #Https #SecurityCertificate

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@Candy875

Posted in: #Tracking

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@Shanna517

One way to prevent this is to use the POST/Redirect/GET pattern.

Instead of directly sending a 200 after receiving the POST request, the server sends a 303 (or 302) redirect instead. The client follows it and gets (via GET) a 200 then. Refreshing this page repeats the last GET, not the previous POST.

For implementation questions, see the Stack Overflow tag "post-redirect-get".

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@Cody1181609

I've used a javascript POST of the form data followed by a js re-direct. Using the back button doesn't cause those forums to be re-submitted.

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: Prevent form resubmit after Browser Back button click In the early days of the web it was a problem that clicking the browser's Back button after clicking Submit could cause the form to be

More posts by @Candy875

: Moving website from https to http without requiring visitors to clear their cache For the last few years I have had a website that has had an SSL certificate because we were operating an online

: This is a special tag that is designed to be used only by the system for questions that have had all of their other tags removed. All questions in the system must have at least one tag.

: Google complains about missing hreflang tags despite documentation that says only a canonical tag should be used for untranslated conent I followed a Google tutorial for profile pages on my website.

: Reliably track a visitor's time spent playing music First of all, I understand pre-optimization is the root of all evil (and I have a nasty tendency of falling into that trap). However, I feel

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