Jquery check if value is numeric

Question

I was wondering if anybody had a quick and dirty jquery method that will check if a value is numeric or not? I was thinking about using a regex type method to check the value, if not do not submit the form. I was using jquery validation, but I am running into issues just loading jquery validation.

I just have one value that I want to make sure is numeric.

See several others e.g http://stackoverflow.com/questions/9716468/is-there-any-function-like-isnumeric-in-javascript-to-validate-numbers — glosrob, Jan 22 '13 at 17:16
You can't do a simple parse as it will sometimes return a number from a non-numeric string - try `console.log(parseInt("10px", 10))` — Reinstate Monica Cellio, Jan 22 '13 at 17:16

score 58 · Answer 1 · answered Jan 22 '13 at 17:15

58

Sure, use jQuery's isNumeric() function.

$.isNumeric("-10");  // true
$.isNumeric(16);     // true
$.isNumeric(0xFF);   // true
$.isNumeric("0xFF"); // true
$.isNumeric("8e5");  // true (exponential notation string)
$.isNumeric(3.1415); // true
$.isNumeric(+10);    // true
$.isNumeric(0144);   // true (octal integer literal)
$.isNumeric("");     // false
$.isNumeric({});     // false (empty object)
$.isNumeric(NaN);    // false
$.isNumeric(null);   // false
$.isNumeric(true);   // false
$.isNumeric(Infinity); // false
$.isNumeric(undefined); // false

answered Jan 22 '13 at 17:15

j08691

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some times it will give TypeError: $.isNumeric is not a function then use jquery.isNumeric() function – Pragnesh Rupapara Sep 20 '13 at 11:21
also getting a TypeError – AlxVallejo Jun 07 '14 at 05:20
+1 because you write in comments the result of each call compared to jquery web site documentation. – Samuel Nov 18 '14 at 01:00
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Note: `$.isNumeric("1,234"); // false ` – Vic Sep 14 '15 at 15:25
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Note: This API has been deprecated in jQuery 3.3. – be3 Nov 02 '20 at 13:54

Jquery check if value is numeric

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