Call dynamic function in Javascript

Question

my code:

var MyObj = {
    myFnc = function(a, b) {
       console.log('A: '+a+', B: '+b);
    }
}

var list = new Array('myFnc', new Array('var1', 'var2'));
MyObj[list[0]].call(list[1]);

but not working, somebody can help me?

ALWAYS check the error console. You have a syntax error in constructing your object. You need a `:`, not an `=` when assigning the function. — Dark Falcon, Jun 10 '14 at 17:32
what isn't working about it? is it throwing an error? what is the error? — , Jun 10 '14 at 17:32

score 4 · Answer 1 · edited May 23 '17 at 11:49

4

I guess you want to use apply instead. And don't forget about the first parameter, which is the this context!

var MyObj = {
    myFnc: function(a, b) {
       console.log('A: '+a+', B: '+b);
    };
}

var list = ['myFnc', ['var1', 'var2']];
MyObj[list[0]].apply(MyObj, list[1]);

edited May 23 '17 at 11:49

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answered Jun 10 '14 at 17:33

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David Sherret · Answer 2 · 2014-06-10T17:39:06.590

You need to use .apply instead of .call and supply a context to the apply function:

var MyObj = {
    myFnc : function(a, b) {
       console.log('A: '+a+', B: '+b);
    }
};

var list = new Array('myFnc', new Array('var1', 'var2'));
MyObj[list[0]].apply(window, list[1]);

.apply calls the function and uses the specified array as the parameters.

Additionally, use a colon instead of an equals sign when defining myFnc.

Call dynamic function in Javascript

2 Answers2