Call a function without using eval?

Question

I have an object attached as data to a DIV. I also have a string that contains the name of a function of that object.

function callFunction(divId, funcName, data) {
  o = $(divId).data('myObject');
  // how do I call o.funcName(data) ???

// Somewhere else...
callFunction('#myDivId', "myFunction", someData);

The divId and funcName are actually coming from a Java applet on the page, which is why they're strings.

You have to use eval() to turn the string into an object, otherwise it's just a string. But beware the security issues around the use of eval() — cusimar9
– cusimar9, Commented May 17, 2011 at 14:26
possible duplicate of How to execute a JavaScript function when I have its name as a string — outis
– outis, Commented Apr 25, 2012 at 1:21

Quentin · Accepted Answer · 2011-05-17 14:25:36Z

4

Assuming it is a global function:

window['foo']()

is the same as to

foo()

answered May 17, 2011 at 14:25

Quentin

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2 Comments

edoloughlin Over a year ago

It's not a global function. It's on an object hanging off a DIV. See o = $(divId).data('myObject') above.

Quentin Over a year ago

In that case: the_div['foo']()

Björn · Accepted Answer · 2011-05-17 14:29:35Z

1

Depends on your functions scope. It it's attached to the window, you can do this;

<script>
    var my_dynamic_function = function(param) {
        alert(param);
    };

    var callFunction = function(divId, funcName, data) {
        ...
        window[funcName]('PARAM!');
    };

    ...

    callFunction('#myDivId', 'my_dynamic_function', data);
</script>

answered May 17, 2011 at 14:29

Björn

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