Question

Why does this error (jquery-1.7.1.js:3256 Uncaught TypeError: Object 50 has no method 'apply' Uncaught TypeError: Object 50 has no method 'apply'):

var func = function(foo) {
  // some code
});

$('.some_class').keyup(func('bar'));

Many thanks :).

Answer 1

You’re passing the result of fun as the callback to be invoked. You want to send the function itself. Do this by wrapping it in an anonymous function:

$('.some_class').keyup(function(){
 func('bar');
});