This website show us how to manage HTML DOM with vanilla JavaScript only for modern browsers and IE 11+

Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API. If you use Moment.js, you already know how to use Day.js.

Another great post on Frontend Development written by Ire Aderinokun, Frontend Developer and User Interface Designer. In this article she shows us how to highlighting search matches.