An extension adds features and functions to a browser. You create one using familiar web-based technologies: HTML, CSS, and JavaScript. An extension can use the same web APIs as JavaScript on a web page, but it also has access to an extra set of JavaScript APIs.

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

The Odin Project empowers aspiring web developers to learn together for free

The HTTP Authorization request header can be used to provide credentials that authenticate a user agent with a server, allowing access to protected resources.

Log in to Jira, Confluence, and all other Atlassian Cloud products here. Not an Atlassian user? Sign up for free.

A blazing fast & offline frontend playground

In today’s digital landscape, creating a successful application or software library is an intricate dance of understanding user needs, leveraging community involvement, and making strategic decisions...

Create one-page websites based on user specifications.

HTML is the technology that defines the content and structure of any website. Written properly, it should also define the semantics (meaning) of the content in a machine-readable way, which is vital for accessibility, search engine optimization, and making use of the built-in features browsers provide for content to work optimally. This module covers the basics of the language, before looking at key areas such as document structure, links, lists, images, forms, and more.

Learn about Auth0, explore tutorials, download code samples, connect with us, find resources and more.

The web development framework for building modern apps.

The web development framework for building modern apps.

Visual Studio Code for the Web and the vscode.dev URL

Documentation, tutorials, and tools for developers building on Ethereum.

This HTML course for web developers provides a solid overview for developers, from novice to expert level HTML.

# Learn web development | MDN  Welcome to MDN **Learning Web Development** (also known as **Learn**). This resource provides a structured set of tutor...

Learn how to set up your Deno development environment. Watch how to install Deno, configure VS Code, enable type checking and autocomplete, and optimize your TypeScript development workflow.

The content behind MDN Web Docs

Get started creating apps with Expo.

FlutterFlow is a visual development platform that lets you build mobile, web, and desktop apps incredibly fast, without sacrificing quality or features.

Docs for Windsurf (formerly Codeium): your modern coding superpowers.

Puppeteer will be familiar to people using other browser testing frameworks. You

Want to dive into smart contract development but need help getting started? Explore smart contract examples and ideas in this article!

For your inspiration, read later, media and stuff

Helping millions of developers easily build, test, manage, and scale applications of any size — faster than ever before.

Helping millions of developers easily build, test, manage, and scale applications of any size — faster than ever before.

Helping millions of developers easily build, test, manage, and scale applications of any size — faster than ever before.