How can I validate if a given number is integer or not in Javascript?

Question

I'm currently validating a form with JavaScript in which the user has to type their id number . I already figure out how to validate if the value is numeric, but I'm struggling to find a way to validate if the given number is integer or not.

https://developer.mozilla.org/es/docs/Web/JavaScript/Referencia/Objetos_globales/Number/isInteger — Rashomon, Jan 28 '20 at 20:46
Does this answer your question? [How do I check that a number is float or integer?](https://stackoverflow.com/questions/3885817/how-do-i-check-that-a-number-is-float-or-integer) — Rashomon, Jan 28 '20 at 20:57
Does this answer your question? [How to detect if a given number is an integer?](https://stackoverflow.com/questions/1323314/how-to-detect-if-a-given-number-is-an-integer) — Maximillian Laumeister, Jan 29 '20 at 00:55

score 1 · Accepted Answer · answered Jan 28 '20 at 20:49

1

Try this:

Number.isInteger(Number(input))

answered Jan 28 '20 at 20:49

Grey Chanel

197
5

@JoséCañizales let's accept this answer if it's helpful for you. – Grey Chanel Jan 28 '20 at 20:59
Note about integer range with `Number.MAX_SAFE_INTEGER`. Let's see more about [Grandes enteros en JavaScript](https://codesearchable.com/es/4134437/) – Grey Chanel Jan 28 '20 at 21:28

How can I validate if a given number is integer or not in Javascript?

1 Answers1