how to make html input not autofill

<form method="post" action="/post/" autocomplete="off">
	<!-- The entire form has autocomplete disabled. -->
</form>

<!-- or you turn it off for just one input -->
<input type="text" autocomplete="off">

<input type="text" autocomplete="off" />

<form method="post" action="/form" autocomplete="off">
[…]
</form>

someForm.setAttribute( "autocomplete", "off" ); 
someFormElm.setAttribute( "autocomplete", "off" );