Number field accepting letters "e"

[Filipe-Bacof]

I have noticed that some fields like Input Zip Code are accepting a single letter "e" and numbers together within the field. This behavior may be reflected in some other fields as well.

[torus-cfilo]

This is how input type="number" work on the web per spec.

• https://html.spec.whatwg.org/multipage/input.html#number-state-(type%3Dnumber)
• https://stackoverflow.com/a/31706796/2554793