示例: Todo 列表

这是我们在基础教程里开发的迷你型的任务管理应用的完整源码。这个代码也在我们的 example 仓库可以找到。 当然也可以在浏览器通过 CodeSandbox 运行.

入口文件

index.js

import React from 'react'
import { render } from 'react-dom'
import { Provider } from 'react-redux'
import { createStore } from 'redux'
import rootReducer from './reducers'
import App from './components/App'
const store = createStore(rootReducer)
render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById('root')
)

创建 Action

actions/index.js

let nextTodoId = 0
export const addTodo = text => ({
type: 'ADD_TODO',
id: nextTodoId++,
text
})
export const setVisibilityFilter = filter => ({
type: 'SET_VISIBILITY_FILTER',
filter
})
export const toggleTodo = id => ({
type: 'TOGGLE_TODO',
id
})
export const VisibilityFilters = {
SHOW_ALL: 'SHOW_ALL',
SHOW_COMPLETED: 'SHOW_COMPLETED',
SHOW_ACTIVE: 'SHOW_ACTIVE'
}

Reducers

reducers/todos.js

const todos = (state = [], action) => {
switch (action.type) {
case 'ADD_TODO':
return [
...state,
{
id: action.id,
text: action.text,
completed: false
}
]
case 'TOGGLE_TODO':
return state.map(todo =>
todo.id === action.id ? { ...todo, completed: !todo.completed } : todo
)
default:
return state
}
}
export default todos

reducers/visibilityFilter.js

const visibilityFilter = (state = 'SHOW_ALL', action) => {
switch (action.type) {
case 'SET_VISIBILITY_FILTER':
return action.filter
default:
return state
}
}
export default visibilityFilter

reducers/index.js

import { combineReducers } from 'redux'
import todos from './todos'
import visibilityFilter from './visibilityFilter'
export default combineReducers({
todos,
visibilityFilter
})

展示组件

components/Todo.js

import React from 'react'
import PropTypes from 'prop-types'
const Todo = ({ onClick, completed, text }) => (
<li
onClick={onClick}
style={{
textDecoration: completed ? 'line-through' : 'none'
}}
>
{text}
</li>
)
Todo.propTypes = {
onClick: PropTypes.func.isRequired,
completed: PropTypes.bool.isRequired,
text: PropTypes.string.isRequired
}
export default Todo

components/TodoList.js

import React from 'react'
import PropTypes from 'prop-types'
import Todo from './Todo'
const TodoList = ({ todos, toggleTodo }) => (
<ul>
{todos.map(todo => (
<Todo key={todo.id} {...todo} onClick={() => toggleTodo(todo.id)} />
))}
</ul>
)
TodoList.propTypes = {
todos: PropTypes.arrayOf(
PropTypes.shape({
id: PropTypes.number.isRequired,
completed: PropTypes.bool.isRequired,
text: PropTypes.string.isRequired
}).isRequired
).isRequired,
toggleTodo: PropTypes.func.isRequired
}
export default TodoList

components/Link.js

import React from 'react'
import PropTypes from 'prop-types'
const Link = ({ active, children, onClick }) => (
<button
onClick={onClick}
disabled={active}
style={{
marginLeft: '4px'
}}
>
{children}
</button>
)
Link.propTypes = {
active: PropTypes.bool.isRequired,
children: PropTypes.node.isRequired,
onClick: PropTypes.func.isRequired
}
export default Link

components/Footer.js

import React from 'react'
import FilterLink from '../containers/FilterLink'
import { VisibilityFilters } from '../actions'
const Footer = () => (
<div>
<span>Show: </span>
<FilterLink filter={VisibilityFilters.SHOW_ALL}>All</FilterLink>
<FilterLink filter={VisibilityFilters.SHOW_ACTIVE}>Active</FilterLink>
<FilterLink filter={VisibilityFilters.SHOW_COMPLETED}>Completed</FilterLink>
</div>
)
export default Footer

components/App.js

import React from 'react'
import Footer from './Footer'
import AddTodo from '../containers/AddTodo'
import VisibleTodoList from '../containers/VisibleTodoList'
const App = () => (
<div>
<AddTodo />
<VisibleTodoList />
<Footer />
</div>
)
export default App

容器组件

containers/VisibleTodoList.js

import { connect } from 'react-redux'
import { toggleTodo } from '../actions'
import TodoList from '../components/TodoList'
const getVisibleTodos = (todos, filter) => {
switch (filter) {
case 'SHOW_COMPLETED':
return todos.filter(t => t.completed)
case 'SHOW_ACTIVE':
return todos.filter(t => !t.completed)
case 'SHOW_ALL':
default:
return todos
}
}
const mapStateToProps = state => ({
todos: getVisibleTodos(state.todos, state.visibilityFilter)
})
const mapDispatchToProps = dispatch => ({
toggleTodo: id => dispatch(toggleTodo(id))
})
export default connect(
mapStateToProps,
mapDispatchToProps
)(TodoList)

containers/FilterLink.js

import { connect } from 'react-redux'
import { setVisibilityFilter } from '../actions'
import Link from '../components/Link'
const mapStateToProps = (state, ownProps) => ({
active: ownProps.filter === state.visibilityFilter
})
const mapDispatchToProps = (dispatch, ownProps) => ({
onClick: () => dispatch(setVisibilityFilter(ownProps.filter))
})
export default connect(
mapStateToProps,
mapDispatchToProps
)(Link)

其他组件

containers/AddTodo.js

import React from 'react'
import { connect } from 'react-redux'
import { addTodo } from '../actions'
const AddTodo = ({ dispatch }) => {
let input
return (
<div>
<form
onSubmit={e => {
e.preventDefault()
if (!input.value.trim()) {
return
}
dispatch(addTodo(input.value))
input.value = ''
}}
>
<input ref={node => (input = node)} />
<button type="submit">Add Todo</button>
</form>
</div>
)
}
export default connect()(AddTodo)