It is the third layer of the layer cake of standard web technologies, two of which (HTML and CSS)
HTML is the markup language that we use to structure and give meaning to our web content, for example defining paragraphs, headings, and data tables, or embedding images and videos in the page.
CSS is a language of style rules that we use to apply styling to our HTML content, for example setting background colors and fonts, and laying out our content in multiple columns.
- Server Load. Being client-side reduces the demand on the website server.
- JS scripts and plugins are used everywhere by everyone, even by regular users;
- it has the richest feature set;
- specialists who can code in JS languages are always in demand.