Question

I am trying to execute a function stored in a variable and pass params to it. However, on the .apply line, I am getting an error; Uncaught TypeError: Cannot call method 'apply' of undefined

Fiddle: http://jsfiddle.net/valamas/vzesm/

function target(msg)
{
    alert(msg);
}

function mainfunc (func)
{
    var args = new Array();
    for (var i = 1; i < arguments.length; i++)
        args.push(arguments[i]);

    console.log('args: ' + args);

    //-- different attempts
    window[func].apply(this, args);
    //window[func].apply(null, Array.prototype.slice.call(arguments, 1));
    //this[func].apply(this, Array.prototype.slice.call(arguments, 1));
}


$(function ()
{
    console.log('\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n');
    console.log('ready');
    mainfunc('target', 'hello,', 'there!');
});​

Answer 1

jsFiddle doesn’t put the JS into the global scope, so target isn’t actually a property of window.

Adding this code will make your script work:

window.target = target;

Or to be more explicit:

window.target = function() { ...

Demo: http://jsfiddle.net/Blender/vzesm/3/