Pure JavaScript a function like jQuery s isNumeric

Question

Is there is any function like isNumeric in pure JavaScript   I know jQuery has this function to check the integers

User · Answer

isFinite String n   returns true for n 0 or  0    1 1  or 1 1   but false for  1 dog  or  1 2 3 4    - Infinity and any NaN values

User · Answer

There is Javascript function isNaN which will do that   isNaN 90    gt false   so you can check numeric by    isNaN 90    gt true

User · Answer

There s no isNumeric   type of function  but you could add your own   function isNumeric n      return  isNaN parseFloat n    amp  amp  isFinite n       NOTE  Since parseInt   is not a proper way to check for numeric it should NOT be used

User · Answer

function IsNumeric val        return Number parseFloat val       val

User · Answer

var str    test343       isNumeric      -     d   d    d   d    d       isNumeric test str

User · Answer

This should help   function isNumber n      return  isNaN parseFloat n    amp  amp  isFinite n       Very good link  Validate decimal numbers in JavaScript - IsNumeric

[javascript] Pure JavaScript: a function like jQuery's isNumeric()

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