Question

68

Ways to call a Javascript function using the value of a string variable?

rated 0 times [ 75] [ 7] / answers: 1 / hits: 31363 / 15 Years ago, fri, july 17, 2009, 12:00:00

I've seen this technique for calling a Javascript function based on the value of a string variable.

function foo() {

    alert('foo');

}



var test = 'foo';



window[test]();  //This calls foo()

Is this the accepted way to do it or is there a better way? Any cross-browser issues to worry about?

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alexandreah

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answered 15 Years ago madalyngriseldas · Accepted Answer

Looks fine to me. I would probably create a simple helper function like following:

function runFunction(name, arguments)

{

    var fn = window[name];

    if(typeof fn !== 'function')

        return;



    fn.apply(window, arguments);

}



//If you have following function



function foo(msg)

{

    alert(msg);

}



//You can call it like



runFunction('foo', ['test']); //alerts test.