JavaScript Libraries for adding offline support to web apps.

Prettier is an opinionated code formatter. It enforces a consistent style by parsing your code and re-printing it with its own rules that take the maximum line length into account, wrapping code when necessary.

Svelte is a radical new approach to building user interfaces. Whereas traditional frameworks like React and Vue do the bulk of their work in the browser, Svelte shifts that work into a compile step that happens when you build your app.

Instead of using techniques like virtual DOM diffing, Svelte writes code that surgically updates the DOM when the state of your app changes.

Easy control over your dark mode in a web environment

meSpeak.js (modulary enhanced speak.js) is a 100% client-side JavaScript text-to-speech library

Gatsby is a modern framework for blazing fast websites, made with React and GraphQL.

howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio. This makes working with audio in JavaScript easy and reliable across all platforms.

The european cookie law regulates the management of cookies and you should ask your visitors their consent before exposing them to third party services.

A tool for managing JavaScript projects with multiple packages.

Polly.JS is a standalone, framework-agnostic JavaScript library that enables recording, replaying, and stubbing HTTP interactions.

Polly taps into native browser APIs to mock requests and responses with little to no configuration while giving you the ability to take full control of each request with a simple, powerful, and intuitive API.

Vue Native is a framework to build cross platform native mobile apps using JavaScript

Falcor is the innovative data platform that powers the Netflix UIs. Falcor allows you to model all your backend data as a single Virtual JSON object on your Node server. On the client you work with your remote JSON object using familiar JavaScript operations like get, set, and call. If you know your data, you know your API.

Falcor is middleware. It is not a replacement for your application server, database, or MVC framework. Instead Falcor can be used to optimize communication between the layers of a new or existing application.

A WebGL accelerated, browser based JavaScript library for training and deploying ML models. Use flexible and intuitive APIs to build and train models from scratch using the low-level JavaScript linear algebra library or the high-level layers API. Use TensorFlow.js model converters to run pre-existing TensorFlow models right in the browser. Retrain pre-existing ML models using sensor data connected to the browser, or other client-side data.

Uppy is a sleek, modular file uploader that integrates seamlessly with any application. It’s fast, easy to use and lets you worry about more important problems than building a file uploader.

Fetch files from local disk, Google Drive, Dropbox, Instagram, or snap and record selfies with a camera;
Preview and edit metadata with a nice interface;
Upload to the final destination, optionally process/encode

Blazing fast, zero configuration web application bundler

A javascript metaframework

Build micro frontends that coexist and can each be written with their own framework. This allows you to:

• Use multiple frameworks on the same page without refreshing the page (React, AngularJS, Angular, Ember, or whatever you're using)
• Write code using a new framework, without rewriting your existing app
• Lazy load code for improved initial load time.
• Hot reload entire chunks of your overall application (instead of individual files)

Neutrino is a companion tool which lets you build web and Node.js applications with shared presets or configurations. It intends to make the process of initializing and building projects much simpler by providing minimal development dependencies.

Adds static typing to JavaScript to improve developer productivity and code quality.

JavaScript End to End Testing Framework. Fast, easy and reliable testing for anything that runs in a browser.

emotion is a high performance, lightweight css-in-js library that supports both string and object based styles.