jquery-mask-as-number
Simple mask jquery extension that ensures valid integer numbers in text inputs
Demo: https://jsfiddle.net/andretissot/9prtpcd5/
HTML5 number field only highlites invalid entry, but doesn't enforce the valid:
On Chrome 55:
On Firefox 50:
This jquery extension forces the input to only allow integer values, and minus if first character.
The input value is not limited by the Browser's maximum integer.