From the people who brought you jQuery comes a set of widgets built using jQuery complete with documentation and tutorials.
You really don’t need jQuery any more …and that’s thanks to jQuery.
Here, the Github team talk through their process of swapping out jQuery for vanilla JavaScript, as well as their forays into web components (or at least the custom elements bit).
Opinionated ideas on writing JavaScript. I like it when people share their approaches like this.
A handy guide to navigating all the new-fangled JavaScript.
This is a fascinating bit of web archeology: John has annotated the code from one of the earliest versions of jQuery.
A detailed comparison of jQuery and MooTools.
DOM scripting and event handling.