HTML Forms: How (and Why) to Prevent Double Form Submissions – Bram.us
I can see how this would be good to have fixed at the browser level.
Link tags: submit
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Happier HTML5 Form Validation - daverupert.com
Dave uses just a smidgen of JavaScript to whip HTML5’s native form validation into shape.
Instead of being prescriptive about error messaging, we use what the browser natively gives us.