JavaScript IsNumeric Function

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In the past, there’s been so many times I needed to tell if an object was numeric. With the below function, it’s very easy to tell if an item is numeric.

 //return false if blank, null, undefined or NaN.
 function isNumeric(v) {
   if (v == null || v == undefined || v== '') {
      return false;
   }
                        
   return !isNaN(v) && isFinite(v);
 }

If your project is already using jQuery, you could always use jQuery.IsNumeric()

Author: Brian Cline

Brian is a programmer living in Niagara Falls with ten years of development experience. He is passionate about automation, business process re-engineering, and gamification. For the last six years or so, he has been working with Salesforce and JavaScript.

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