Add a draggable window to a page using Greasemonkey

Question

I\'m trying to create a Greasemonkey script that adds a draggable div to every web page. For some reason, the div isn\'t displaying at all. What might be the reason for this?

Answer 1

Completely wrong on the first go - the issue is the use of $(document).append. You cannot append directly to the document, you can only append to a node.

So Either

$(document.body).append()

or

$('body').append()

Here's the fiddle for proof.

It's probably the lack of the @require, maybe your greasemonkey is out of date?

// ==UserScript==
// @name       My Fancy New Userscript
// @namespace  http://use.i.E.your.homepage/
// @version    0.1
// @description  enter something useful
// @match      http://*/*
// @require    http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js
// @copyright  2012+, You
// ==/UserScript==
jQuery(function($){
    var _highest = 0;   

    $("div").each(function() {
        var _current = parseInt($(this).css("zIndex"), 10);
        if(_current > _highest) {
            _highest = _current + 1;
        }
    });
    $('body').append('
 Hello, This is an addon div from Greasemonkey. 
');
});
​

Boilerplate template. Should work fine OOB.