Javascript validation to only allow positive and negative Integers...no decimals

Question

Hey I just need a standard JS validation to allow a string with just positive or negative #'s and no decimals.

1 = true
10 = true
-10 = true
-1.5 = false
1.5 = false

Thanks

http://stackoverflow.com/questions/14636536/how-to-check-if-a-variable-is-an-integer-in-javascript — orhanhenrik, Oct 16 '14 at 13:56
http://stackoverflow.com/questions/2304052/check-if-a-number-has-a-decimal-place-is-a-whole-number — Saifuddin Sarker, Oct 16 '14 at 13:59

score 0 · Answer 1 · edited May 23 '17 at 11:59

0

This one uses Regular Expression:

function isInteger(n) {
    return (typeof n == 'number' && /^[-]?[0-9]+$/.test(n+''));
}

This one works with strings too:

function isInteger(n) {
    return /^[-]?[0-9]+$/.test(n+'');
}

edited May 23 '17 at 11:59

Community

answered Oct 16 '14 at 14:20

jyrkim

1 Answers1