If the form is submitted using ajax, does it mean that there is no need to consider the issue of repeated submission of the form after refreshing the page?

When submitting with ajax, do you need to consider the issue of repeated submission of the form?

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When submitting with ajax, do you need to consider the issue of repeated form submission?

How is ajax triggered? Is it possible to trigger it multiple times?

It depends on your specific situation.

As long as you trigger an event, such as a click event, your refresh at this time has nothing to do with asynchrony. You refresh but your request has already been sent,