javascript - How should I use a window.confirm dialog box with a form? -

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i have tried window.confirm on submit button saying "are sure" if click on no submits itself? wrong way of using it?

<button type="submit" class="btn btn-primary" onclick="window.confirm('are sure want transfer user?')"> transfer </button>

use this

<form onsubmit="return confirm('are sure want transfer user?')">  </form>

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