HTML · Form and input attributes

form (attribute)

Associates a control with a form elsewhere in the document.

htmlRunnable example html course

Syntax

form="signup"

Example

Try it

<form id="signup" action="/signup"><button>Sign up</button></form><input form="signup" name="name" aria-label="Name">

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.