JavaScript Courses

Most modern languages use some form of type inference, including TypeScript, Rust, and Haskell. Learn how to build your own compiler from scratch that performs static type inference and emits WebAssembly.

Code a high-performance fullstack app from scratch! Skip the framework while creating a modern web app with Vanilla JavaScript and a rock-solid backend JSON API with Go.

A friendly, practical introduction to functional programming fundamentals in JavaScript. Learn core functional programming concepts while coding with pure functions, recursion, higher-order functions, closures, and function composition.

Implement classic patterns like Singleton, Factory, and Observer alongside modern patterns for single-page and multi-page architectures to build robust, efficient web apps using pure JavaScript.

Upgrade your JavaScript knowledge with post-ES6 features. Learn modern syntax, async programming, and advanced JavaScript features.

Learn best practices for building scalable, high-performance web applications. Deep dive into front-end engineering: DOM APIs, virtualization, state management, and performance.

Gain clarity on JavaScript's inner workings, including the event loop and asynchronous programming, scope, closures, and classes with interactive questions designed to enhance your understanding of JavaScript!

Put your fundamental JavaScript knowledge into practice through hands-on web projects. Use browser APIs, asynchronous programming, Node.js, and modern tooling to build and deploy web apps, all with vanilla JavaScript!

Learn advanced JavaScript performance optimization: garbage collection, memory profiling, data structures like sets and arrays, and event loop management. Learn performance-driven programming, preparing you to write blazingly fast and efficient code!

Build a mental model of JavaScript's performance characteristics through understanding virtual machines under the hood.

Explore what is possible with new Web APIs! Browsers can do so much now, including speech recognition, geolocation, OS integration, face detection, augmented reality, and reading from sensors, external hardware, and devices!

Explore Vanilla JavaScript core concepts, work with DOM APIs, handle events, and build a web application from scratch. Delve into advanced topics like SPA routing, web components, and reactive programming.

Develop an under-the-hood knowledge of UI development by learning techniques such as data binding, UI composition, templating, virtual DOM and its reconciliation, and hooks, all from scratch!

Challenge your knowledge with a quiz on the advanced parts of web development! Answer 30 questions from JavaScript and CSS to performance, web security, and HTTP protocols.

Go beyond localStorage to use newer and more performant APIs like IndexedDB for storing JSON, CacheStorage for caching requests, and the FileSystem API for accessing the local file system.

Learn basic password logins to using Google to log in. Then, use WebAuthn API and Passkeys to use FaceID and biometrics to make passwordless web apps!

Explore new web app capabilities to detect when your web app is in the background to execute code later, even when your web app isn’t in focus.

Take your first steps into the wide world of JavaScript and walk away with the core skills needed to become a professional JavaScript programmer!

This web development course will take you from building your first website to having the foundation for becoming a professional web developer. Start learning for free!

Learn a suite of design patterns to improve your JavaScript and React code architecture!

Create custom, reusable HTML elements with the Web Components API! Learn to create custom Web Components using JavaScript and the Lit library.

Learn to build apps where the client can push messages to the server and talk in real-time. Start today!

Monorepos have taken the JavaScript world by storm, unlocking powerful new patterns around composition, encapsulation, and ease of maintenance.

Prepare for the recruiter prescreen questions, from the phone screen to real cultural and technical interview questions that companies use to screen candidates.

Go under the hood of powerful techniques like: Higher Order Functions, Function Composition, Pure Functions, and Immutability of State.

Get a tour of the building blocks of programming like variables, loops, functions and operations. Then learn the three main pillars of JavaScript.

Improve your JavaScript by applying functional programming concepts like function purity, point-free, partial-application, currying, plus even more advanced concepts.

Uncover the most challenging, yet most powerful features in server Node.js, to help you write and debug professional server code.

Get up to speed with new object destructuring JavaScript features like tagged template literals, destructuring, iterators, generators, and async-await. Learn more!

Dive into JavaScript's core language features; types & coercion, scope & closure, and JavaScript's object-oriented system.

Understand JavaScript’s prototypal design and ES6+ classes to better organize and scale your JavaScript apps.

Gain an intuitive understanding of asynchronous features of JavaScript in ES6+: iterators, generators, promises, and async/await!

Learn to solve algorithms and analyze them efficiently in both an interview setting and also in your day-to-day development.

Write more efficient JavaScript, optimize rendering performance, load assets faster with a CDN, split loading resources with Webpack, and more!

Learn what causes common JavaScript bugs and how to debug them. Learn how to use the latest developer tools to isolate and fix the source of issues.

Learn the history of JavaScript with a big focus to its functions. Learn how browsers work, how servers work, and ways to enhance security.

Effective asynchronous JavaScript means knowing various different patterns and weaving them together to write readable and understandable code. 

Learning how to build and manage asynchronous programs is perhaps the most important part of becoming an effective JavaScript programmer.