Ive seen <button type=button> before but thought that you never need it. Turns out you do
If you have a button on the page then by default its type is button.
But if that button is inside a form then by default its type is submit.
It makes sense. A button outside of a form with a type of submit wouldn't make sense: what would it submit? Same with reset. So it makes sense that the only thing the button can do is to be a button. But if you have a form the most likely thing that button will do is to submit the form (the second most likely is to reset the form).
So if your form contains a button that doesn't submit or reset the form (as I had recently), it needs to be of type button.
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