Question

When you type 3.14 for example, and press enter – validation popup appear. As should be fixed number (by default step=1). But when you type some string, e.g. "hello" and press enter – form submit. Why?

See: http://jsfiddle.net/keeD2/

Answer 1

Try adding required to the field:

<form action="#">
<input type="number" required/>
<input type="submit"/>
</form>​

See: http://jsfiddle.net/keeD2/2/