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Learn about the technology used in modern web sites and applications.

The scripting language for web browsers.

JS History

Before Javascript, the web was static, with pages composed of text and...

The Hyper Text Transfer Protocol (HTTP) is the protocol for requesting and transmitting web content.

Input elements with type="image" can be used as submit buttons.

Forms allow users to enter data, making your site interactive.

They could be performing a search, logging in, signing up...

Styling input pseudo elements.

An extensive guide to browser differences with the range input, and how to style them.

Web extensions use a manifest.json file for configuration.

First we need to set up the site to load the script for.

"conte...

MDN guide to javascript loops.