为什么JS Fiddle给我错误`Uncaught TypeError：undefined不是function`？

Question

I'm testing a Plupload script when I keep getting `Uncaught TypeError: undefined is not a function .

Not able to figure out why, I tested with an example from jQuery . I get the same error ( se fiddle ).

Can anyone tell me why this isn't working?

Code:

$( "div" ).greenify({
  color: "orange"
});

(function ( $ ) {
    $.fn.greenify = function( options ) {
       // Do stuff here
    };
}( jQuery ));

Answer 1

Because you have those in the wrong order:

// First add the plugin
(function ( $ ) {
    $.fn.greenify = function( options ) {
       // Do stuff here
    };
}( jQuery ));

// THEN use it
$( "div" ).greenify({
  color: "orange"
});

Updated Fiddle

The general order of things is:

1. script tag for jQuery
2. script tags for any plugins
3. script tag(s) for your code