jQuery in Greasemonkey 1.0 conflicts with websites using jQuery

Question

Ever since the new Greasemonkey 1.0 was released a few days ago, every site that has jQuery and where I use jQuery in my Greasemonkey script do not run my script properly. T

Answer 1

Had the same problem.

Since GM version 1.0 , all my scripts that @require jQuery, running on sites that also uses jQuery stopped working.

I know, I could try something like $ = unsafeWindow.$ , but that is not the point.

The point here is that they used to work, and now they wont.

Adding @grant GM_log fixed them.

Answer 2

Greasemonkey 1.0, radically changed the way the sandbox works, busting thousands of scripts. This is a huge problem, and I hope you will join me in voicing your opinion/experiences on the principle bug report for this issue.

The Greasemonkey blog claims that you can workaround the issue with the following:

this.$ = this.jQuery = jQuery.noConflict(true);

... Which I'm not sure will work in all cases. And it is the exact wrong approach from a side-effects-avoiding, DRY-principle, atomic-coding philosophy.   In my opinion, the best strategy is to restore the sandbox.

Reactivate the sandbox by specifying a @grant value (other than none). Edit your Metadata Block to end with the following lines:

// @grant       GM_addStyle
// @grant       GM.getValue
// ==/UserScript==
/*- The @grant directive is needed to work around a design flaws introduced in GM 1.0
    and again in GM 4.0.
    It restores the sandbox.
*/

The sandbox will be restored and all conflicts will be resolved.
And the scripts will be compatible with superior engines like Tampermonkey and Violentmonkey.

Answer 3

Two years on and this "feature" still hasn't been sufficiently documented or addressed.

Scripts which require jQuery still conflict with some pages which use jQuery.

Potential solutions are:

1. Add @grant GM_log or similar to sandbox the script

2. Alias existing jQuery objects in the script by adding this block:

   var my_jquery = jQuery;

   jQuery.noConflict(true);

   var $ = my_jquery, jQuery = my_jquery;

3. Don't use jQuery

All in all, a terrible decision from Greasemonkey.