Merge pull request #4169 from shaedrich/preact

Create topic "Preact.js"

topics/preact/index.md

@@ -0,0 +1,26 @@
+---
+aliases: preactjs, preact-js
+topic: preact
+logo: preact.png
+display_name: Preact.js
+short_description: Preact.js is a lightweight React alternative with the same API.
+related: react, virtual-dom, hmr, jsx, ssr
+released: November 14, 2015
+github_url: https://github.com/preactjs/preact
+url: https://preactjs.com/
+---
+**Preact.js** is a lightweight React alternative with the same API.
+
+# Similarities to React
+* ES6 Class, hooks, and Functional Components
+* Compatibility via a simple preact/compat alias
+* JSX, VDOM, DevTools, HMR, SSR.
+* Cross-browser compatibility
+* Transparent asynchronous rendering with a pluggable scheduler
+
+# Differences from React
+* Works in the browser without any transpilation steps
+* Syntactic sugar
+    * `props`, `state` and `context` are passed to `render()`
+    * Standard HTML attributes like `class` and `for` can be used instead of `className` and `htmlFor`
+