How can I limit possible inputs in a HTML5 “number” element?

Question

For element, maxlength is not working. How can I restrict the maxlength for that number element?

Answer 1

Maycow Moura's answer was a good start. However, his solution means that when you enter the second digit all editing of the field stops. So you cannot change values or delete any characters.

The following code stops at 2, but allows editing to continue;

//MaxLength 2
onKeyDown="if(this.value.length==2) this.value = this.value.slice(0, - 1);"