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Omi - Front End Cross-Frameworks Framework

Merge Web Components, JSX, HTM, Virtual DOM, Functional style and Proxy into one framework with tiny size and high performance. Write components once, using in everywhere, such as Omi, React, Preact, Vue or Angular.

Quick Preview

Pass data through the component tree without having to pass props down manually at every level by store, auto update the view on demand.

import { define, render } from 'omi'

class Store {
  data = {
    count: 1
  }
  sub = () => {
    this.data.count--
  }
  add = () => {
    this.data.count++
  }
}

define('my-counter', ['count'], _ => (
  <div>
    <button onClick={_.store.sub}>-</button>
    <span>{_.store.data.count}</span>
    <button onClick={_.store.add}>+</button>
  </div>
), {
    css: `span { color: red; }`,
    installed() {
      console.log('installed')
    }
  })

render(<my-counter />, 'body', new Store)

• The second and fourth parameter of define is optional
• <my-counter></my-counter> can be used in any framework or no framework, such as document.createElement('my-counter')

Ecosystem of Omi

Base

Project	Description
omi-docs and codepen and wcd demos	Omi official documents
omim	Cross frameworks and themes components.(DOCS & REPL && JOIN US!)
omis and codepen and docs	Functional Component + Store + Scoped Style + Web Components in tiny size
omi-kbone	直接使用 Omis 开发小程序或 Web，基于 kbone
omio	Omi for old browsers with same api(IE8+)
omi-ssr	Server-side rendering(support omio only)
omi-router	Omi official router in 1KB js
omi-cli	Project scaffolding. → Base Templates and → Other Templates
omi-devtools	Browser DevTools extension
omiu	Simple Omi UI
omil	Webpack loader for Omi.js components.(DOCS)
omi-snippets	A beautify VSCode extension for .omi or .eno file, Install now!
obaa or JSONPatcherProxy	Observe or Proxy any object's any change

Snake MVP

Project	Description
omi-snake	The Snake-Eating Game Based on MVP Architecture Written by Omi
omi-kbone-snake	omi-kbone 写的 MVP 架构的贪吃蛇小程序
react-snake	The Snake-Eating Game Based on MVP Architecture Written by React

Mini Program(小程序)

Project	Description
react-kbone	直接使用 React 开发小程序或 Web，基于 kbone
preact-kbone	直接使用 Preact 开发小程序或 Web，基于 kbone
omix	极小却精巧的小程序框架
omi-cloud	小程序•云开发
omip	直接使用 Omi 开发小程序或 H5 SPA
mps	原生小程序增强框架(JSX + Less 输出 WXML + WXSS)，也支持 QQ 轻应用
cax	小程序 Canvas 和 SVG 渲染引擎
omi-mp	通过微信小程序开发和生成 Web 单页应用(H5 SPA)
westore	小程序状态管理
comi	小程序代码高亮和 markdown 渲染组件
wx-touch-event	基于 AlloyFinger/omi-finger 改造的小程序手势解决方案

Other

Project	Description
omi-piano	Build piano with Omi and Omi Snippets, Enjoy now!
omi-chart	Simple HTML5 Charts using chart-x tag.
md2site	Static Site Generator with markdown powered by Omio.
omi-30-seconds	Useful Omi snippets that you can understand in 30 seconds.
omi-canvas	Perfect fusion of web components, jsx and canvas.
omi-swiper	Omi + Swiper
omi-vscode	VSCode extension for omi, Install now!
omi-ex	Omi.js extension(TypeScript)
omi-transform	Omi / css3transform integration. Made css3 transform super easy in your Omi project.
omi-finger	Support touch and gesture events in your Omi project.
omi-touch	Smooth scrolling, rotation, pull to refresh and any motion for the web.
omi-native	Render web components to native
omi-i18n	Internationalization solution for omi.js using i18next ecosystem
omi-page	Tiny client-side router by page
omie	Build cross platform desktop apps with Omi.js and Electron.js

Why Omi?

• Tiny size and High performance
• Cross framework(react, preact, vue, angular) custom elements by omi
• One framework. Mobile & desktop & mini program
• Be friendly to custom elements, you can pass false attributes to elements through string '0' or string 'flase', you can pass object attributes to elements through : prefix and Omi.$
• Easy two way binding by extend api
• Supports TypeScript
• Reactive data-binding
• Native tap event support
• Having Cross-frameworks UI components - omim
• Excellent compatibility(IE8+) with omio
• Enhanced CSS, rpx unit support base on 750 screen width
• Compliance with browser trend and API design
• Merge Web Components, JSX and HTM into one framework
• Web Components can also be a data-driven view, UI = fn(data).
• JSX is the best development experience (code intelligent completion and tip) UI Expression with least grammatical noise and it's turing complete(template engine is not, es template string is but grammatical noise is too loud)
• Look at Facebook React vs Web Components，Omi combines their advantages and gives developers the freedom to choose the way they like
• Shadow DOM merges with Virtual DOM, Omi uses both virtual DOM and real Shadow DOM to make view updates more accurate and faster
• Scoped CSS's best solution is Shadow DOM, the community churning out frameworks and libraries for Scoped CSS (using JS or JSON writing styles such as Radium, jsxstyle, react-style; binding to webpack using generated unique className filename-classname-hash, such as CSS Modules, Vue), are hack technologies; and Shadow DOM Style is the perfect solution.
• The original Path Updating store system. Proxy-based automatic accurate update, low power consumption, high degree of freedom, excellent performance, easy integration of requestIdleCallback,It will automatically update UI partially when data is changed

Compare TodoApp by Omi and React, Omi and React rendering DOM structure:

Omi	React

Omi uses Shadow DOM based style isolation and semantic structure.

Useful Resources

Contribution

Build a example:

npm start example_name

Build omi:

npm run build

Unit testing

npm run test

Maintainers

• @f
• @LeeHyungGeun
• @dntzhang
• @xcatliu

Please contact us for any questions. Also, Add Omi QQ Group.

Thanks

• preact
• JSONPatcherProxy
• create-react-app
• JSX

License

MIT © Tencent