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[English ](./README.md ) | 简体中文 | [한국어 ](./README.KR.md )
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< p align = "right" > Omi < strong > v5.0.23< / strong > < / p >
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< p align = "right" > Omio < strong > v1.3.7< / strong > < / p >
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< p align = "center" > < img src = "./assets/omi-logo2019.svg" alt = "omi" width = "300" / > < / p >
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< h2 align = "center" > Omi - 下一代前端框架,去万物糟粕,合精华为一点点 JS< / h2 >
< p align = "center" > < b > 基于 Web Components 并支持 IE8+(omio) 和 小程序(omip)< / b > < / p >
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## Omi 生态
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[→ Omi 生态学习路线图 ](https://github.com/Tencent/omi/tree/master/assets/rm.md )
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| **项目** | **描述** |
| ------------------------------- | ----------------------------------- |
| [omi-docs ](https://github.com/Tencent/omi/blob/master/docs/main-concepts.cn.md )| Omi 官方文档 |
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| [omip![ ](https://raw.githubusercontent.com/dntzhang/cax/master/asset/hot.png ) ](https://github.com/Tencent/omi/tree/master/packages/omip)| 直接使用 Omi 开发小程序!!!|
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| [omio![ ](https://raw.githubusercontent.com/dntzhang/cax/master/asset/hot.png ) ](https://github.com/Tencent/omi/tree/master/packages/omio)| 兼容老浏览器的 Omi 版本(支持到IE8+和移动端浏览器)。|
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| [omiu![ ](https://raw.githubusercontent.com/dntzhang/cax/master/asset/hot.png )](https://tencent.github.io/omi/packages/omiu/examples/build/zh-cn.html)| Omi 官方 UI。|
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| [omix![ ](https://raw.githubusercontent.com/dntzhang/cax/master/asset/hot.png ) ](https://github.com/Tencent/omi/tree/master/packages/omix)| 极小却精巧的小程序框架。|
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| [md2site![ ](https://raw.githubusercontent.com/dntzhang/cax/master/asset/hot.png ) ](https://tencent.github.io/omi/assets/md2site/)| 用 markdown 生成静态网站文档.|
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| [omi-mvvm ](https://github.com/Tencent/omi/blob/master/tutorial/omi-mvvm.cn.md )| MVVM 王者归来, [mappingjs ](https://github.com/Tencent/omi/tree/master/packages/mappingjs ) 强力加持。|
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| [omi-chart ](https://github.com/Tencent/omi/tree/master/packages/omi-chart )| 一个 chart-x 标签搞定报表|
| [mp-mvvm ](https://github.com/Tencent/omi/tree/master/packages/mp-mvvm )| 小程序插上 MVVM 的翅膀, [mappingjs ](https://github.com/Tencent/omi/tree/master/packages/mappingjs ) 强力加持。|
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| [omi-html ](https://github.com/Tencent/omi/tree/master/packages/omi-html )| Using [htm ](https://github.com/developit/htm ) in omi.|
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| [omi-30-seconds ](https://github.com/Tencent/omi/tree/master/packages/omi-30-seconds )| 30 秒理解一段有用的 Omi 代码片段.|
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| [omi-sprite ](https://github.com/Tencent/omi/tree/master/packages/omi-sprite )| Web Components, JSX 和 Canvas 的完美融合|
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| [omi-canvas ](https://github.com/Tencent/omi/tree/master/packages/omi-canvas )| Web Components, JSX 和 Canvas 的完美融合|
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| [omi-mp ](https://github.com/Tencent/omi/tree/master/packages/omi-mp )| 通过微信小程序开发和生成 Web 单页应用(H5 SPA)|
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| [omi-router ](https://github.com/Tencent/omi/tree/master/packages/omi-router ) |Omi 官方路由,超级小的尺寸,只有 1KB 的 js。[→ DEMO](https://tencent.github.io/omi/packages/omi-router/examples/spa/build/)|
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| [omi-devtools ](https://github.com/f/omi-devtools )| 谷歌浏览器开发工具扩展|
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| [omi-cli ](https://github.com/Tencent/omi/tree/master/packages/omi-cli )| 项目脚手架工具,各种模板任你选。 |
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| [omi-ex ](https://github.com/Tencent/omi/tree/master/packages/omi-ex )| Omi.js 扩展(TypeScript) |
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| [omi-transform ](https://github.com/Tencent/omi/tree/master/packages/omi-transform )|Omi 和 [css3transform ](https://tencent.github.io/omi/packages/omi-transform/css3transform/ ) 完美结合. 让 css3 transform 在你的 Omi项目中变得超级简单.|
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| [omi-tap ](https://github.com/Tencent/omi/releases/tag/v4.0.24 )| Omi 原生支持 tap 事件( omi v4.0.24+) |
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| [omi-finger ](https://github.com/Tencent/omi/tree/master/packages/omi-finger )|Omi 官方手势库|
| [omi-touch ](https://github.com/Tencent/omi/tree/master/packages/omi-touch )|丝般顺滑的触摸运动|
| [omi-use ](https://github.com/Tencent/omi/blob/master/docs/main-concepts.cn.md#use )|跟 React hooks 类似的方式定义纯组件|
| [omi-native ](https://github.com/Tencent/omi/tree/master/packages/omi-native )|把 web components 渲染到 native, 比如 IOS 、Android|
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|[omi-i18n](https://github.com/i18next/omi-i18n)| Omi 国际化解决方案 |
| [omi-page ](https://github.com/Tencent/omi/tree/master/packages/omi-page ) | 基于 [page.js ](https://github.com/visionmedia/page.js ) 的 Omi 路由|
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### 特性
- 小巧的尺寸
- 拥有官方 UI 组件库 - [omiu ](https://tencent.github.io/omi/packages/omiu/examples/build/zh-cn.html )
- 使用 [omio ](https://github.com/Tencent/omi/tree/master/packages/omio ) 可以兼容到 IE8
- 真正的 [MVVM ](https://github.com/Tencent/omi/blob/master/tutorial/omi-mvvm.cn.md ), 拥有 [mappingjs ](https://github.com/Tencent/omi/tree/master/packages/mappingjs ) 强力支持
- 支持 `TypeScript`
- 响应式数据绑定
- 增强了 CSS, [支持 rpx 单位 ](https://github.com/Tencent/omi/releases/tag/v4.0.26 ),基于 **750** 屏幕宽度
- [基于 Shadow Dom 设计 ](https://developers.google.cn/web/fundamentals/web-components/shadowdom?hl=zh-cn )
- 利用[Chrome 开发工具扩展 ](https://github.com/f/omi-devtools)轻松调试,[从 Chrome 应用商店安装](https://chrome.google.com/webstore/detail/omijs-devtools/pjgglfliglbhpcpalbpeloghnbceocmd/related)
- 符合浏览器的发展趋势以及API设计理念
- [**Web Components** ](https://developers.google.com/web/fundamentals/web-components/ ) + [**JSX** ](https://reactjs.org/docs/introducing-jsx.html ) 相互融合为一个框架 Omi
- Web Components 也可以数据驱动视图, `UI = fn(data)`
- JSX 是开发体验最棒(智能提示)、[语法噪音最少](https://github.com/facebook/jsx#why-not-template-literals)、图灵完备的 UI 表达式,模板引擎不完备,模板字符串完备但是语法噪音太大
- 看看[Facebook React 和 Web Components对比优势](https://www.cnblogs.com/rubylouvre/p/4072979.html), Omi 融合了各自的优点,而且给开发者自由的选择喜爱的方式
- `Shadow DOM` 与 `Virtual DOM` 融合, Omi 既使用了`虚拟 DOM`,也是使用真实 `Shadow DOM` ,让视图更新更准确更迅速
- 局部 CSS 最佳解决方案(`Shadow DOM`),社区为局部 CSS 折腾了不少框架和库(使用js或json写样式, 如:`Radium`, `jsxstyle`, `react-style`; 与webpack绑定使用生成独特的className`文件名—类名—hash值`,如:`CSS Modules`, `Vue`),还有运行时注入`scoped atrr` 的方式,都是 hack 技术;`Shadow DOM Style` 是最完美的方案
<!-- - 独创的 `Path Updating` 机制,基于 Proxy 全自动化的精准更新,功耗低,自由度高,性能卓越,方便集成 `requestIdleCallback` ,对 this.update 说再见吧!只要使用 `store` 系统,它就会自动化按需更新局部视图 -->
对比同样开发 TodoApp, Omi 和 React 渲染完的 DOM 结构, Omi 使用 Shadow DOM 隔离样式和语义化结构:
| **Omi** | **React** |
|-|-|
| ![Omi ](./assets/omi-render.jpg ) | ![React ](./assets/react-render.jpg ) |
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## omi-mp
> 通过微信小程序开发和一键生成 Web 的 H5 SPA (基于 omi + [omi-router](https://github.com/Tencent/omi/tree/master/packages/omi-router))
看下官方模板的转换例子:
| **Index** | **Logs** |
| ------------------------------- | ----------------------------------- |
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|![](./assets/mp1.jpg)| ![](./assets/mp2.jpg)|
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因为 Web 里拉取不到用户登录态,更换了用户头像和名称。
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## 必须收藏的资源
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* [你必须收藏 ES6 Spread Operator 技巧 ](https://github.com/Tencent/omi/blob/master/tutorial/spread-operator.cn.md )
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* [Omio 兼容 IE8 踩坑之路 ](https://github.com/Tencent/omi/blob/master/tutorial/omio.cn.md )
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* [深入浅出 Shadow Dom ](https://github.com/Tencent/omi/blob/master/tutorial/shadow-dom-in-depth.cn.md )
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* [HTM - JSX 的替代品?还是另一种选择? ](https://github.com/Tencent/omi/blob/master/tutorial/omi-html.cn.md )
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* [60FPS Animation In Omi ](https://github.com/Tencent/omi/blob/master/tutorial/omi-transform.cn.md )
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* [Render Web Components To Native ](https://github.com/Tencent/omi/blob/master/tutorial/render-web-components-to-native.cn.md )
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* [Web Components MDN ](https://developer.mozilla.org/zh-CN/docs/Web/Web_Components )
* [Web Components Google ](https://developers.google.com/web/fundamentals/web-components/ )
* [Web Components Org ](https://www.webcomponents.org/introduction )
* [Proxy MDN ](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Proxy )
* [CSS Variables ](https://developer.mozilla.org/zh-CN/docs/Web/CSS/Using_CSS_variables )
* [CSS Shadow Parts ](https://drafts.csswg.org/css-shadow-parts-1/ )
* [Part Theme Explainer ](https://meowni.ca/posts/part-theme-explainer/ )
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* [Platform HTML5 ](https://platform.html5.org/ )
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* [使用 requestIdleCallback ](https://div.io/topic/1370 )
* [A requestIdleCallback polyfill ](https://gist.github.com/paullewis/55efe5d6f05434a96c36 )
* [The Power Of Web Components ](https://hacks.mozilla.org/2018/11/the-power-of-web-components/ )
* [ShadowRoot ](https://developer.mozilla.org/zh-CN/docs/Web/API/ShadowRoot )
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* [Developer Tools support for Web Components in Firefox 63 ](https://blog.nightly.mozilla.org/2018/09/06/developer-tools-support-for-web-components-in-firefox-63/ )
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---
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# 目录
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- [Omi 生态 ](#omi-生态 )
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- [omi-mp ](#omi-mp )
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- [必须收藏的资源 ](#必须收藏的资源 )
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- [一个 HTML 完全上手 ](#一个-html-完全上手 )
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- [再花 30 秒完全上手 ](#再花-30-秒完全上手 )
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- [快速入门 ](#快速入门 )
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- [安装 ](#安装 )
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- [项目模板 ](#项目模板 )
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- [Hello Element ](#hello-element )
- [TodoApp ](#todoapp )
- [Store ](#store )
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- [Mitt ](#mitt )
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- [Observe ](#observe )
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- [生命周期 ](#生命周期 )
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- [调试工具 ](#调试工具 )
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- [浏览器兼容 ](#浏览器兼容 )
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- [React 组件转成 Omi ](#react-组件转成-omi )
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- [相关链接 ](#相关链接 )
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- [贡献者们 ](#贡献者们 )
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- [维护者 ](#维护者 )
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- [感谢 ](#感谢 )
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- [License ](#license )
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## 一个 HTML 完全上手
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下面这个页面不需要任何构建工具就可以执行
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* [点击这里看执行结果 ](https://tencent.github.io/omi/assets/ )
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* [Omi.js CDN ](https://unpkg.com/omi )
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```html
<!DOCTYPE html>
< html >
< head >
< meta charset = "UTF-8" / >
< title > Add Omi in One Minute< / title >
< / head >
< body >
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< script src = "https://unpkg.com/omi" > < / script >
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< script >
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const { WeElement, h, render, define } = Omi
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define('like-button', class extends WeElement {
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install() {
this.data = { liked: false }
}
render() {
if (this.data.liked) {
return 'You liked this.'
}
return h(
'button',
{
onClick: () => {
this.data.liked = true
this.update()
}
},
'Like'
)
}
})
render(h('like-button'), 'body')
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< / script >
< / body >
< / html >
```
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通过上面脚本的执行,你已经定义好了一个自定义标签,可以不使用 render 方法,直接使用 `like-button` 标签:
```jsx
< body >
< like-button > < / like-button >
< / body >
```
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## 再花 30 秒完全上手
你也可以使用现代化的 JS 语法,快速构建 Omi 项目:
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<!-- ```js
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import { render, WeElement, tag, observe } from "omi"
@observe
@tag ("my-counter")
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class MyCounter extends WeElement {
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data = {
count: 0
}
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sub = () => {
this.data.count--
}
add = () => {
this.data.count++
}
render() {
return (
< div >
< button onClick = {this.sub} > -< / button >
< span > {this.data.count}< / span >
< button onClick = {this.add} > +< / button >
< / div >
)
}
}
render(< my-counter / > , "body")
```
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你会发现 `MyCounter` 从未使用过,所以你可以使用下面代码达到同样效果并且避免 Eslint 提示错误: -->
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```js
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import { render, WeElement, define } from 'omi'
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define('my-counter', class extends WeElement {
static observe = true
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css () {
return `span{
color: red;
}`
}
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data = {
count: 1
}
sub = () => {
this.data.count--
}
add = () => {
this.data.count++
}
render() {
return (
< div >
< button onClick = {this.sub} > -< / button >
< span > {this.data.count}< / span >
< button onClick = {this.add} > +< / button >
< / div >
)
}
})
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render(< my-counter / > , 'body')
```
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也可以手动调用 `this.update` ,这样你就可以选择最佳的时机进行更新,而且能够兼容 IE8。
```js
import { render, WeElement, define } from 'omi'
define('my-counter', class extends WeElement {
count = 1
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//也可以直接传递字符串
css = `span{
color: red;
}`
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sub = () => {
this.count--
this.update()
}
add = () => {
this.count++
this.update()
}
render() {
return (
< div >
< button onClick = {this.sub} > -< / button >
< span > {this.count}< / span >
< button onClick = {this.add} > +< / button >
< / div >
)
}
})
render(< my-counter / > , 'body')
```
[→ counter demo ](https://tencent.github.io/omi/packages/omi/examples/counter/ )
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<!--
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你也可以定义成纯函数的形式:
```js
import { define, render } from 'omi'
define('my-counter', function() {
const [count, setCount] = this.use({
data: 0,
effect: function() {
document.title = `The num is ${this.data}.`
}
})
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this.useCss(`button{ color: red; }`)
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return (
< div >
< button onClick = {() = > setCount(count - 1)}>-< / button >
< span > {count}< / span >
< button onClick = {() = > setCount(count + 1)}>+< / button >
< / div >
)
})
render(< my-counter / > , 'body')
```
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如果你不需要 effect 方法, 可以直接使用 `useData` :
```js
const [count, setCount] = this.useData(0)
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``` -->
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## 快速入门
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### 安装
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```bash
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$ npm i omi-cli -g # install cli
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$ omi init my-app # init project, you can also exec 'omi init' in an empty folder
$ cd my-app # please ignore this command if you executed 'omi init' in an empty folder
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$ npm start # develop
$ npm run build # release
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```
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> `npx omi-cli init my-app` 也支持(要求 npm v5.2.0+)
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目录说明:
```
├─ config
├─ public
├─ scripts
├─ src
│ ├─ assets
│ ├─ elements //存放所有 custom elements
│ ├─ store //存放所有页面的 store
│ ├─ admin.js //入口文件,会 build 成 admin.html
│ └─ index.js //入口文件,会 build 成 index.html
```
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#### Scripts
```json
"scripts": {
"start": "node scripts/start.js",
"build": "PUBLIC_URL=. node scripts/build.js",
"build-windows": "set PUBLIC_URL=.& & node scripts/build.js",
"fix": "eslint src --fix"
}
```
你也可以设置 PUBLIC_URL, 比如:
```json
...
"build": "PUBLIC_URL=https://fe.wxpay.oa.com/dv node scripts/build.js",
"build-windows": "set PUBLIC_URL=https://fe.wxpay.oa.com/dv& & node scripts/build.js",
...
```
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#### 切换 omi 和 omio
增加或删除 package.json 里的 alias config 可以切换 omi 和 omio 渲染:
```js
...
"alias": {
"omi": "omio"
}
...
```
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<!-- 关于编译网站的 url 前缀的设置,可以参考两个地址:
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* [build problem ](https://stackoverflow.com/questions/42686149/create-react-app-build-with-public-url )
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* [build env doc ](https://facebook.github.io/create-react-app/docs/adding-custom-environment-variables#referencing-environment-variables-in-the-html )
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比如在 windows 下:
```json
"scripts": {
"start": "node scripts/start.js",
"_build": "node scripts/build.js",
"build":"set PUBLIC_URL=https://fe.wxpay.oa.com/dv& & npm run _build"
}
```
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在 mac os 中:
```json
"scripts": {
"start": "node scripts/start.js",
"_build": "node scripts/build.js",
"build":"PUBLIC_URL=https://fe.wxpay.oa.com/dv npm run _build",
"fix": "eslint src --fix"
},
```
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如果你只想使用相对地址:
```
"build":"set PUBLIC_URL=.& & npm run _build" //windows
"build":"PUBLIC_URL=. npm run _build", //mac os
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``` -->
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### 项目模板
| **Template Type** | **Command** | **Describe** |
| ------------ | -----------| ----------------- |
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|基础模板(v3.3.0+)|`omi init my-app`| 基础模板,支持 omi 和 omio(IE8+)|
|支持预渲染快照骨架的模板|`omi init-snap my-app`| 基础模板,支持 omi 和 omio(IE8+),内置预渲染|
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|TypeScript Template(omi-cli v3.3.0+)|`omi init-ts my-app`|使用 TypeScript 的模板|
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|Mobile Template|`omi init-weui my-app`| 使用了 weui 和 omi-router 的移动 web app 模板|
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|omi-mp Template(omi-cli v3.0.13+)|`omi init-mp my-app` |小程序开发 Web 的模板|
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|MVVM Template(omi-cli v3.0.22+)|`omi init-mvvm my-app` |MVVM 模板|
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<!-- |[SPA Template](https://tencent.github.io/omi/packages/omi - router/examples/spa/build/)(omi - cli v3.0.10+)|`omi init - spa my - app`|使用 omi - router 单页应用的模板| -->
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Cli 自动创建的项目脚手架是基于单页的 create-react-app 改造成多页的,有配置方面的问题可以查看 [create-react-app 用户指南 ](https://facebook.github.io/create-react-app/docs/getting-started )。
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### Hello Element
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先创建一个自定义元素:
```js
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import { define, WeElement } from 'omi'
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define('hello-element', class extends WeElement {
onClick = evt => {
// trigger CustomEvent
this.fire('abc', { name: 'dntzhang', age: 12 })
evt.stopPropagation()
}
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css = `
div {
color: red;
cursor: pointer;
}`
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}
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render(props) {
return (
< div onClick = {this.onClick} >
Hello {props.msg} {props.propFromParent}
< div > Click Me!< / div >
< / div >
)
}
})
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```
使用该元素:
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```js
import { define, render, WeElement } from 'omi'
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import './hello-element'
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define('my-app', class extends WeElement {
data = { abc: 'abc', passToChild: 123 }
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// define CustomEvent Handler
onAbc = evt => {
// get evt data by evt.detail
this.data.abc = ' by ' + evt.detail.name
this.data.passToChild = 1234
this.update()
}
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css = `
div{
color: green;
}`
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}
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render(props, data) {
return (
< div >
Hello {props.name} {data.abc}
< hello-element
onAbc={this.onAbc}
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propFromParent={data.passToChild}
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msg="WeElement"
/>
< / div >
)
}
})
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render(< my-app name = "Omi v4.0" / > , 'body')
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```
告诉 Babel 把 JSX 转化成 Omi.h() 的调用:
``` json
{
"presets": ["env", "omi"]
}
```
需要安装下面两个 npm 包支持上面的配置:
``` bash
"babel-preset-env": "^1.6.0",
"babel-preset-omi": "^0.1.1",
```
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如果你使用 babel7, 也可以使用如下包和配置:
```bash
npm install --save-dev @babel/preset -env
npm install --save-dev @babel/preset -react
```
```js
{
"presets": [
"@babel/preset-env",
[
"@babel/preset-react",
{
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"pragma": "Omi.h"
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}
]
]
}
```
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如果不想把 css 写在 js 里,你可以使用 webpack [to-string-loader ](https://www.npmjs.com/package/to-string-loader ), 比如下面配置:
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``` js
{
test: /[\\|\/]_[\S]*\.css$/,
use: [
'to-string-loader',
'css-loader'
]
}
```
如果你的 css 文件以 `_` 开头, css 会使用 to-string-loader. 如:
``` js
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import { tag, WeElement render } from 'omi'
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define('my-app', class extends WeElement {
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css = require('./_index.css')
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...
...
...
```
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你也可以忘掉这一对繁琐的配置直接使用 omi-cli, 不需要你配置任何东西。
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### TodoApp
下面列举一个相对完整的 TodoApp 的例子:
```js
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import { define, render, WeElement } from 'omi'
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define('todo-list', function(props) {
return (
< ul >
{props.items.map(item => (
< li key = {item.id} > {item.text}< / li >
))}
< / ul >
)
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})
define('todo-app', class extends WeElement {
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static observe = true
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data = { items: [], text: '' }
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render() {
return (
< div >
< h3 > TODO< / h3 >
< todo-list items = {this.data.items} / >
< form onSubmit = {this.handleSubmit} >
< input
id="new-todo"
onChange={this.handleChange}
value={this.data.text}
/>
< button > Add #{this.data.items.length + 1}< / button >
< / form >
< / div >
)
}
handleChange = e => {
this.data.text = e.target.value
}
handleSubmit = e => {
e.preventDefault()
if (!this.data.text.trim().length) {
return
}
this.data.items.push({
text: this.data.text,
id: Date.now()
})
this.data.text = ''
}
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})
render(< todo-app / > , 'body')
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```
### Store
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Omi 的 Store 体系: 从根组件注入,在所有子组件可以共享。使用起来非常简单:
```js
import { define, render, WeElement } from 'omi'
define('my-hello', class extends WeElement {
render() {
//任意子组件的任意方法都可以使用 this.store 访问注入的 store
return < div > {this.store.name}< / div >
}
})
define('my-app', class extends WeElement {
handleClick = () => {
//任意子组件的任意方法都可以使用 this.store 访问注入的 store
this.store.reverse()
this.update()
}
render() {
return (
< div >
< my-hello / >
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< button onclick = {this.handleClick} > reverse< / button >
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< / div >
)
}
})
const store = {
name: 'abc',
reverse: function() {
this.name = this.name.split("").reverse().join("")
}
}
//通过第三个参数注入
render(< my-app / > , document.body, store)
```
与全局变量不同的是, 当有多个根节点的时候就可以注入多个 store, 而全局变量只有一个。
<!--
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使用 Store 体系可以告别 update 方法,基于 Proxy 的全自动属性追踪和更新机制。强大的 Store 体系是高性能的原因,除了靠 props 决定组件状态的组件,其余组件所有 data 都挂载在 store 上,
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```js
export default {
data: {
items: [],
text: '',
firstName: 'dnt',
lastName: 'zhang',
fullName: function () {
return this.firstName + this.lastName
},
globalPropTest: 'abc', //更改我会刷新所有页面,不需要再组件和页面声明data依赖
ccc: { ddd: 1 } //更改我会刷新所有页面,不需要再组件和页面声明data依赖
},
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globalData: ['globalPropTest', 'ccc.ddd'],
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add: function () {
if (!this.data.text.trim().length) {
return;
}
this.data.items.push({
text: this.data.text,
id: Date.now()
})
this.data.text = ''
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}
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//默认 false, 为 true 会无脑更新所有实例
//updateAll: true
}
```
自定义 Element 需要声明依赖的 data, 这样 Omi store 根据自定义组件上声明的 data 计算依赖 path 并会按需局部更新。如:
```js
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define('todo-app', class extends WeElement {
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static get data() {
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//如果你用了 store, 这个只是用来声明依赖, 按需 Path Updating
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return { items: [], text: '' }
}
...
...
...
handleChange = (e) => {
this.store.data.text = e.target.value
}
handleSubmit = (e) => {
e.preventDefault()
this.store.add()
}
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})
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```
* 数据的逻辑都封装在了 store 定义的方法里 (如 store.add)
* 视图只负责传递数据给 store (如上面调用 store.add 或设置 store.data.text)
需要在 render 的时候从根节点注入 store 才能在所有自定义 Element 里使用 this.store:
```js
render(< todo-app > < / todo-app > , 'body', store)
```
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[→ Store 完整的代码 ](https://github.com/Tencent/omi/blob/master/packages/omi/examples/store/main.js )
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总结一下:
* store.data 用来列出所有属性和默认值(除去 props 决定的视图的组件)
* 组件和页面的 data 用来列出依赖的 store.data 的属性 (omi会记录path),按需更新
* 如果页面简单组件很少,可以 updateAll 设置成 true, 并且组件和页面不需要声明 data, 也就不会按需更新
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* globalData 里声明的 path, 只要修改了对应 path 的值, 就会刷新所有页面和组件, globalData 可以用来列出所有页面或大部分公共的属性 Path -->
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## Mitt
如果不想使用 store 的 data 体系,也可以使用发布订阅模式。比如在 Omi 中使用 [mitt ](https://github.com/developit/mitt ) 跨组件通讯:
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* [cross-component-communication ](https://github.com/Tencent/omi/blob/master/packages/omi-30-seconds/README.md#cross-component-communication )
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## Observe
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### Omi Observe
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你可以为那些不需要 store 的自定义元素使用 observe 创建响应式视图,比如:
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```js
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import { define, WeElement } from "omi"
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define("my-app", class extends WeElement {
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static observe = true
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install() {
this.data.name = "omi"
}
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onClick = () => {
this.data.name = "Omi V4.0"
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}
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render(props, data) {
return (
< div onClick = {this.onClick} >
< h1 > Welcome to {data.name}< / h1 >
< / div >
)
}
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})
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```
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<!--
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如果你想要兼容 IE11,请使用 `omi-mobx` 代替 omi 自带的 observe, 往下看..
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### Omi Mobx
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```js
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import { tag, WeElement } from "omi"
import { observe } from "omi-mobx"
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@observe
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@tag ("my-app")
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class MyApp extends WeElement {
install() {
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this.data.name = "omi"
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}
onClick = () => {
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this.data.name = "Omi V4.0"
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}
render(props, data) {
return (
< div onClick = {this.onClick} >
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< h1 > Welcome to {data.name}< / h1 >
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< / div >
)
}
}
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``` -->
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### 生命周期
| Lifecycle method | When it gets called |
| ---------------- | -------------------------------------------- |
| `install` | before the component gets mounted to the DOM |
| `installed` | after the component gets mounted to the DOM |
| `uninstall` | prior to removal from the DOM |
| `beforeUpdate` | before update |
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| `updated` | after update |
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| `beforeRender` | before `render()` |
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| `receiveProps` | parent element re-render will trigger it |
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## 调试工具
使用 [Omi 开发工具 ](https://chrome.google.com/webstore/detail/omijs-devtools/pjgglfliglbhpcpalbpeloghnbceocmd ) 可以非常简单地调试和管理你的 UI。不需要任何配置, 你只要安装然后就能调试。
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既然 Omi 使用了 Web Components 和 Shadow-DOM, 所以不需要像 React 一样安装其他元素面板,只需要使用 Chrome 自带的 **Elements' sidebar** 便可,它和 React 开发者工具一样强大。
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![Omi DevTools ](https://github.com/f/omi-devtools/raw/master/omi-devtools.gif )
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## React 组件转成 Omi
举个例子,下面是吧 weui react 的 button 转成 weui omi 的 button 的例子 :
![react to omi ](./assets/react-to-omi.png )
* [Diff Split ](https://github.com/Tencent/omi/commit/9790fadaaf20cfede80bcf9213756a83fc8c3949?diff=split )
* [Diff Unified ](https://github.com/Tencent/omi/commit/9790fadaaf20cfede80bcf9213756a83fc8c3949?diff=unified )
* [Before ](https://github.com/Tencent/omi/blob/c8af654f1d5865dc557c0b4b8ad524f702a69be5/packages/omi-weui/src/omi-weui/elements/button/button.js )
* [After ](https://github.com/Tencent/omi/blob/9790fadaaf20cfede80bcf9213756a83fc8c3949/packages/omi-weui/src/omi-weui/elements/button/button.js )
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## 浏览器兼容
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> [Omio](https://github.com/Tencent/omi/tree/master/packages/omio) - 兼容老浏览器的 Omi 版本(支持到IE8+和移动端浏览器)
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Omi 4.0+ works in the latest two versions of all major browsers: Safari 10+, IE 11+, and the evergreen Chrome, Firefox, and Edge.
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![→ Browsers Support ](./assets/browsers-support.png )
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[→ polyfills ](https://github.com/webcomponents/webcomponentsjs )
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```html
< script src = "https://unpkg.com/@webcomponents/webcomponentsjs@2.0.0/webcomponents-bundle.js" > < / script >
```
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## 贡献者们
< table > < tbody >
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< tr > < td > < a target = "_blank" href = "https://github.com/dntzhang" > < img width = "60px" src = "https://avatars2.githubusercontent.com/u/7917954?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/LeeHyungGeun" > < img width = "60px" src = "https://avatars2.githubusercontent.com/u/2471651?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/xcatliu" > < img width = "60px" src = "https://avatars1.githubusercontent.com/u/5453359?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/yanceyou" > < img width = "60px" src = "https://avatars2.githubusercontent.com/u/16320418?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/1921622004" > < img width = "60px" src = "https://avatars1.githubusercontent.com/u/19359217?s=60&v=4" > < / a > < / td > < / tr > < tr > < td > < a target = "_blank" href = "https://github.com/f" > < img width = "60px" src = "https://avatars0.githubusercontent.com/u/196477?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/pasturn" > < img width = "60px" src = "https://avatars0.githubusercontent.com/u/6126885?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/ghostzhang" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/194242?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/jayZOU" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/8576977?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/zhengbao" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/1736166?s=60&v=4" > < / a > < / td > < / tr > < tr > < td > < a target = "_blank" href = "https://github.com/vorshen" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/10334783?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/akira-cn" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/316498?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/loo41" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/28095677?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/rainmanhhh" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/13862623?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/nbompetsis" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/11991105?s=60&v=4" > < / a > < / td > < / tr > < tr > < td > < a target = "_blank" href = "https://github.com/CodeFalling" > < img width = "60px" src = "https://avatars1.githubusercontent.com/u/5436704?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/daizhan" > < img width = "60px" src = "https://avatars0.githubusercontent.com/u/5318547?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/validalias" > < img width = "60px" src = "https://avatars1.githubusercontent.com/u/44221844?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/elfman" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/948001?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/132yse" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/12951461?s=60&v=4" > < / a > < / td > < / tr > < tr > < td > < a target = "_blank" href = "https://github.com/NoBey" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/10740524?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/hilkbahar" > < img width = "60px" src = "https://avatars2.githubusercontent.com/u/12161006?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/KidneyFlower" > < img width = "60px" src = "https://avatars1.githubusercontent.com/u/16027183?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/zhangsanshi" > < img width = "60px" src = "https://avatars1.githubusercontent.com/u/3771933?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/xland" > < img width = "60px" src = "https://avatars0.githubusercontent.com/u/2980915?s=60&v=4" > < / a > < / td > < / tr > < tr > < td > < a target = "_blank" href = "https://github.com/winstonxie" > < img width = "60px" src = "https://avatars3.githubusercontent.com/u/16422642?s=60&v=4" > < / a > < / td > < td > < a target = "_blank" href = "https://github.com/ritsc
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## 维护者
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- [@f ](https://github.com/f )
2018-11-01 10:43:37 +08:00
- [@LeeHyungGeun ](https://github.com/LeeHyungGeun )
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- [@dntzhang ](https://github.com/dntzhang )
2018-10-25 11:38:56 +08:00
- [@xcatliu ](https://github.com/xcatliu )
2018-10-20 11:12:43 +08:00
2018-11-11 14:03:54 +08:00
任何 Omi 相关问题欢迎联系我们。也可以[加入 Omi QQ 群](https://github.com/Tencent/omi/issues/169)进行讨论交流。
2018-11-10 14:44:23 +08:00
2018-10-29 14:58:04 +08:00
## 感谢
* [preact ](https://github.com/developit/preact )
* [JSONPatcherProxy ](https://github.com/Palindrom/JSONPatcherProxy )
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* [create-react-app ](https://github.com/facebook/create-react-app )
* [JSX ](https://github.com/facebook/jsx )
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2018-10-20 11:12:43 +08:00
## License
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MIT © Tencent