[Redux] Passing the Store Down with <Provider> from React Redux
Previously, we wrote the Provider component by ourself:
class Provider extends Component {
getChildContext() {
return {
store: this.props.store
};
}
render() {
return this.props.children;
}
}
Provider.childContextTypes = {
store: React.PropTypes.object
};
Then we can get 'store' from the 'context' from each child container component:
class VisibleTodoList extends Component {
componentDidMount() {
const { store } = this.context;
this.unsubscribe = store.subscribe(() =>
this.forceUpdate()
);
}
componentWillUnmount() {
this.unsubscribe();
}
render() {
const props = this.props;
const { store } = this.context;
const state = store.getState();
return (
<TodoList
todos={
getVisibleTodos(
state.todos,
state.visibilityFilter
)
}
onTodoClick={id =>
store.dispatch({
type: 'TOGGLE_TODO',
id
})
}
/>
);
}
}
VisibleTodoList.contextTypes = {
store: React.PropTypes.object
};
or Persentiaonal component:
const AddTodo = (props, { store }) => {
let input;
return (
<div>
<input ref={node => {
input = node;
}} />
<button onClick={() => {
store.dispatch({
type: 'ADD_TODO',
id: nextTodoId++,
text: input.value
})
input.value = '';
}}>
Add Todo
</button>
</div>
);
};
AddTodo.contextTypes = {
store: React.PropTypes.object
};
Because the solution is so convenient, we can use library instead of writing our own Provider:
So we can remvoe all the whole Provider class component, instead of we do:
const {Provider} = ReactRedux;
In html:
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-redux/4.0.0/react-redux.js"></script>
---------
Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JS Bin</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/redux/3.0.4/redux.js"></script>
<script src="https://fb.me/react-0.14.0.js"></script>
<script src="https://fb.me/react-dom-0.14.0.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-redux/4.0.0/react-redux.js"></script> </head>
<body>
<div id='root'></div>
</body>
</html>
const todo = (state, action) => {
switch (action.type) {
case 'ADD_TODO':
return {
id: action.id,
text: action.text,
completed: false
};
case 'TOGGLE_TODO':
if (state.id !== action.id) {
return state;
}
return {
...state,
completed: !state.completed
};
default:
return state;
}
};
const todos = (state = [], action) => {
switch (action.type) {
case 'ADD_TODO':
return [
...state,
todo(undefined, action)
];
case 'TOGGLE_TODO':
return state.map(t =>
todo(t, action)
);
default:
return state;
}
};
const visibilityFilter = (
state = 'SHOW_ALL',
action
) => {
switch (action.type) {
case 'SET_VISIBILITY_FILTER':
return action.filter;
default:
return state;
}
};
const { combineReducers } = Redux;
const todoApp = combineReducers({
todos,
visibilityFilter
});
const { Component } = React;
const Link = ({
active,
children,
onClick
}) => {
if (active) {
return <span>{children}</span>;
}
return (
<a href='#'
onClick={e => {
e.preventDefault();
onClick();
}}
>
{children}
</a>
);
};
class FilterLink extends Component {
componentDidMount() {
const { store } = this.context;
this.unsubscribe = store.subscribe(() =>
this.forceUpdate()
);
}
componentWillUnmount() {
this.unsubscribe();
}
render() {
const props = this.props;
const { store } = this.context;
const state = store.getState();
return (
<Link
active={
props.filter ===
state.visibilityFilter
}
onClick={() =>
store.dispatch({
type: 'SET_VISIBILITY_FILTER',
filter: props.filter
})
}
>
{props.children}
</Link>
);
}
}
FilterLink.contextTypes = {
store: React.PropTypes.object
};
const Footer = () => (
<p>
Show:
{' '}
<FilterLink
filter='SHOW_ALL'
>
All
</FilterLink>
{', '}
<FilterLink
filter='SHOW_ACTIVE'
>
Active
</FilterLink>
{', '}
<FilterLink
filter='SHOW_COMPLETED'
>
Completed
</FilterLink>
</p>
);
const Todo = ({
onClick,
completed,
text
}) => (
<li
onClick={onClick}
style={{
textDecoration:
completed ?
'line-through' :
'none'
}}
>
{text}
</li>
);
const TodoList = ({
todos,
onTodoClick
}) => (
<ul>
{todos.map(todo =>
<Todo
key={todo.id}
{...todo}
onClick={() => onTodoClick(todo.id)}
/>
)}
</ul>
);
let nextTodoId = 0;
const AddTodo = (props, { store }) => {
let input;
return (
<div>
<input ref={node => {
input = node;
}} />
<button onClick={() => {
store.dispatch({
type: 'ADD_TODO',
id: nextTodoId++,
text: input.value
})
input.value = '';
}}>
Add Todo
</button>
</div>
);
};
AddTodo.contextTypes = {
store: React.PropTypes.object
};
const getVisibleTodos = (
todos,
filter
) => {
switch (filter) {
case 'SHOW_ALL':
return todos;
case 'SHOW_COMPLETED':
return todos.filter(
t => t.completed
);
case 'SHOW_ACTIVE':
return todos.filter(
t => !t.completed
);
}
}
class VisibleTodoList extends Component {
componentDidMount() {
const { store } = this.context;
this.unsubscribe = store.subscribe(() =>
this.forceUpdate()
);
}
componentWillUnmount() {
this.unsubscribe();
}
render() {
const props = this.props;
const { store } = this.context;
const state = store.getState();
return (
<TodoList
todos={
getVisibleTodos(
state.todos,
state.visibilityFilter
)
}
onTodoClick={id =>
store.dispatch({
type: 'TOGGLE_TODO',
id
})
}
/>
);
}
}
VisibleTodoList.contextTypes = {
store: React.PropTypes.object
};
const TodoApp = () => (
<div>
<AddTodo />
<VisibleTodoList />
<Footer />
</div>
);
const {Provider} = ReactRedux;
const { createStore } = Redux;
ReactDOM.render(
<Provider store={createStore(todoApp)}>
<TodoApp />
</Provider>,
document.getElementById('root')
);
[Redux] Passing the Store Down with <Provider> from React Redux的更多相关文章
- [Redux] Passing the Store Down Implicitly via Context
We have to write a lot of boiler plate code to pass this chore down as a prop. But there is another ...
- [Redux] Passing the Store Down Explicitly via Props
n the previous lessons, we used this tool to up level variable to refer to the Redux chore. The comp ...
- react + redux 实现幻灯片
写在前面: 这一篇是我 使用scss + react + webpack + es6实现幻灯片 的进阶篇,效果请点我,将会使用上redux的基础用法,因为一开始没有理解好redux的用法,单纯看文档, ...
- 【原】react+redux实战
摘要:因为最近搞懂了redux的异步操作,所以觉得可以用react+redux来做一个小小的项目了,以此来加深一下印象.切记,是小小的项目,所以项目肯定是比较简单的啦,哈哈. 项目效果图如图所示:(因 ...
- React & Redux 的一些基本知识点
一.React.createClass 跟 React.Component 的区别在于后者使用了ES6的语法,用constructor构造器来构造默认的属性和状态. 1. React.createCl ...
- [Redux] Generating Containers with connect() from React Redux (AddTodo)
Code to be refacted: const AddTodo = (props, { store }) => { let input; return ( <div> < ...
- webpack+react+redux+es6开发模式
一.预备知识 node, npm, react, redux, es6, webpack 二.学习资源 ECMAScript 6入门 React和Redux的连接react-redux Redux 入 ...
- react+redux教程（六）redux服务端渲染流程
今天,我们要讲解的是react+redux服务端渲染.个人认为,react击败angular的真正“杀手锏”就是服务端渲染.我们为什么要实现服务端渲染,主要是为了SEO. 例子 例子仍然是官方的计数器 ...
- react+redux教程（四）undo、devtools、router
上节课,我们介绍了一些es6的新语法:react+redux教程(三)reduce().filter().map().some().every()....展开属性 今天我们通过解读redux-undo ...
随机推荐
- 玩转Win32开发（2）：完整的开发流程
上一篇中我给各位说了一般人认为C++中较为难的东西——指针.其实对于C++,难点当然不局限在指针这玩意儿上,还有一些有趣的概念,如模板类.虚基类.纯虚函数等,这些都是概念性的东西,几乎每一 ...
- 使用Mina框架开发 QQ Android 客户端
Apache MINA是一个网络应用程序框架,用来帮助用户简单地开发高性能和高可靠性的网络应用程序.它提供了一个通过Java NIO在不同的传输例如TCP/IP和UDP/IP上抽象的事件驱动的异步AP ...
- Linux下rar unrar的安装
Linux下rar unrar的安装: 以3.8.0版本为例,如果是64位平台,执行以下命令,也可以去官方网站:)下载最新版: wget http://www.rarlab.com/rar/rarli ...
- 发布到IIS后 程序乱码
网站-功能视图-.net全球化 编码设置 请求:utf-8 文件:gb2312 响应:utf-8 响应头:utf-8 可以根据需要自己定义
- Asp.Net--主题/皮肤文件
主题 是皮肤的集合.皮肤描述了控件应该如何显示,它可以定义样式的属性,图片,颜色等. 如果拥有多个主题,用户可以根据需要选择主题来显示站点,这只需要通过点击按钮,从一个皮肤切换到另一个皮肤. 皮肤文件 ...
- C# \\u8888类型的unicode转换为字符串方法
1.双斜杠\\ 处理: 2.将编码分组,将编码转换为int,再转换为char. string sss = "\\u6c88\\u9633"; '; string[] arr = a ...
- php+js 瀑布流源码
官方网站:更多源码 新浪微博:QQ公众号 QQ:各种源码 602902342 大牛技术群: 452207697 下载地址:http://pan.baidu.com/s/1bnNipI3 密码: h93 ...
- struts2 JS获取上传文件的绝对路径，兼容IE和FF
因为file控件上传失败后会自动清空,所以使用文本框来保存上传路径,而且在不同的浏览器下,控件的样式也需要兼容.下面是自己用到的实例 // 初始化判断浏览器的版本,根据版本的不同使用不同的样式func ...
- java开发软件的安装
jdk+eclipse+svn+maven+mysql+tomcat7.0+sublime安装包和jar插件 配置管理工具-SVN http://download.csdn.net/detail/u0 ...
- POJ 1064 Cable master（二分查找+精度）（神坑题）
POJ 1064 Cable master 一开始把 int C(double x) 里面写成了 int C(int x) ,莫名奇妙竟然过了样例,交了以后直接就wa. 后来发现又把二分查找的判断条 ...