How Do I Access The Parameter Names Of A Function In Javascript

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JavaScript

function foo(arg1,arg2,arg3)
{
}

var argsList = GetArgsList(foo);

console.log(argsList)

//Output : arg1,arg2,arg3

How do i accomplish this ?

Posted 10-Nov-14 6:52am

hemanthkumar k

Updated 10-Nov-14 6:55am

DamithSL

v2

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DamithSL · Accepted Answer · 2014-11-10T07:07:00

Solution 1

JavaScript

var STRIP_COMMENTS = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/mg;
var ARGUMENT_NAMES = /([^\s,]+)/g;

function GetArgsList(fn) {
    
    var fnStr = fn.toString().replace(STRIP_COMMENTS, '');
    var result = fnStr.slice(fnStr.indexOf('(') + 1, fnStr.indexOf(')')).match(ARGUMENT_NAMES);
    if (result === null) result = [];
    return result;
}

check How to get function parameter names/values dynamically from javascript[^]

Posted 10-Nov-14 7:07am

DamithSL

Comments

Manas Bhardwaj 10-Nov-14 13:16pm

Yes +5!

hemanthkumar k 10-Nov-14 13:24pm

Thanks, That solves my problem :)

DamithSL 10-Nov-14 13:29pm

Thanks Manas