jQuery in widget

Question

I want to use jQuery in an add on JS library that can be added to random websites. These websites may or may not use jQuery already.

I have 3 questions around this actually:

1. I will probably load jQuery dynamically from my own js script (not from a script tag in the document head). Will jquery work this way? how can I make sure it will run in time without having the standard $(document).ready(function(){} in the main document?

2. What should I do to avoid conflicts with existing jQuery (if any) in the web site code.

3. Is there a recommended way to add a widget that includes jQuery to random websites while providing minimal code and simplest integration.

Answer 1

This is pretty loose and incomplete -- and really is meant to be a starting point:

if (typeof $ != 'undefined') {
    var msg = 'This page already using jQuery v' + $.fn.jquery;
} else {
    var s = document.createElement('script');
    s.setAttribute('src', 'http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js');
    document.getElementsByTagName('head')[0].appendChild(s);
    var msg = 'This page is now jQuerified';
}

then wait via a brief setTimeout() before running a ready() function