mdn web docs, previously mozilla developer network and formerly mozilla developer center, is a documentation repository and learning resource for web developers. it was started by mozilla in 2005 as a unified place for documentation about open web standards, mozilla's own projects, and developer guides.

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. we're proud that svelte was recently voted the most loved web framework with the most satisfied developers drawing the most interest in learning it in a trio of industry surveys. we think you'll love it too. read the introductory blog post to learn more.

flutter is an open-source ui software development kit created by google. it is used to develop cross-platform applications for android, ios, linux, macos, windows, google fuchsia, and the web from a single codebase. first described in 2015, flutter was released in may 2017.