JavaScript

Maintainable Express.js code after scaling means making common code more feature-rich while reducing boilerplate. Find out how to enable promise-based route code and centralize both error handling and normal-results handling in Express.js apps.

WebAssembly gives near-native performance to web apps and allows languages other than JavaScript—plus their libraries—to be used on the web. This tutorial leverages Rust and the Web Audio API to make a basic guitar tuner app that runs at 60 FPS, even on mobile.

Time and date manipulation is notoriously difficult. Developers encountering time zone rules, leap seconds, differences in locale-specific formatting are wise to resort to popular time and date manipulation libraries. But without thinking about how exactly they work, it's still easy to create all sorts of obscure bugs.

As patterns go, REST APIs are so useful and ubiquitous that every web developer, regardless of language or platform, should know how to build one. In this article, Toptal Freelance JavaScript Developer Marcos Henrique da Silva shows how to create a simple and secure REST API for user management on Node.js.

JavaScript frameworks based on React can help you build a fast, reliable mobile app, but it’s not always easy to determine which framework is best for your project. Choosing the wrong framework can result in an app with slow and redundant code. JavaScript expert Sean Wang builds the same natural language processing mobile application using Cordova, Ionic, and React Native, then discusses the advantages and limitations of each.

The Tanagra.js library is designed to be simple and lightweight, and it currently supports Node.js and ES6 classes. The main implementation supports JSON, and an experimental version supports Google Protocol Buffers.

Missing the luxury of a good, old-fashioned remote control when the laptop is beyond easy reach? Transform your old smartphone into a remote and learn some basic Node.js/Express/Pug along the way.

Toptal's JavaScript Speed Coding Challenge invited creative solutions from the beginning. As the week played out, competitors got closer and closer to the maximum theoretical score. Then something unexpected happened...

Inspired by stale-while-revalidate cache control logic, modern sites implement stale-while-refresh logic on the UI side. Thankfully, React Hooks make this logic painlessly reusable across components.