JavaScript плагины, библиотеки и фреймворки

https://maxfarseer.gitbooks.io/react-course-ru-v2/content/

https://oncebot.github.io/pushbar.js/

https://oncebot.github.io/popbox.js/

https://github.com/shipshapecode/shepherd

https://github.com/Simonwep/pickr

https://lumin.rocks/

$(".someClass").css("background-color:green;").html("Hello World");

Поддерживает такие методы: addClass, animate, attr, css, cssdom, each, empty, getAttr, html, insertAfter, insertBefore, insertFirst, insertLast, offset, on, removeAttr, removeClass, text, toggleClass
https://vladocar.github.io/nanoJS/

https://github.com/fe3dback/str