範例:Todo 清單
這是我們在基礎教學中建立的小型 todo 應用程式的完整的原始碼。
進入點
index.js
import React from 'react'
import { render } from 'react-dom'
import { Provider } from 'react-redux'
import { createStore } from 'redux'
import todoApp from './reducers'
import App from './components/App'
let store = createStore(todoApp)
render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById('root')
)
Action Creator
actions/index.js
let nextTodoId = 0
export const addTodo = (text) => {
return {
type: 'ADD_TODO',
id: nextTodoId++,
text
}
}
export const setVisibilityFilter = (filter) => {
return {
type: 'SET_VISIBILITY_FILTER',
filter
}
}
export const toggleTodo = (id) => {
return {
type: 'TOGGLE_TODO',
id
}
}
Reducer
reducers/todos.js
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 Object.assign({}, 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
}
}
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'
const todoApp = combineReducers({
todos,
visibilityFilter
})
export default todoApp
Presentational Component
components/Todo.js
import React, { PropTypes } from 'react'
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, { PropTypes } from 'react'
import Todo from './Todo'
const TodoList = ({ todos, onTodoClick }) => (
<ul>
{todos.map(todo =>
<Todo
key={todo.id}
{...todo}
onClick={() => onTodoClick(todo.id)}
/>
)}
</ul>
)
TodoList.propTypes = {
todos: PropTypes.arrayOf(PropTypes.shape({
id: PropTypes.number.isRequired,
completed: PropTypes.bool.isRequired,
text: PropTypes.string.isRequired
}).isRequired).isRequired,
onTodoClick: PropTypes.func.isRequired
}
export default TodoList
components/Link.js
import React, { PropTypes } from 'react'
const Link = ({ active, children, onClick }) => {
if (active) {
return <span>{children}</span>
}
return (
<a href="#"
onClick={e => {
e.preventDefault()
onClick()
}}
>
{children}
</a>
)
}
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'
const Footer = () => (
<p>
Show:
{" "}
<FilterLink filter="SHOW_ALL">
All
</FilterLink>
{", "}
<FilterLink filter="SHOW_ACTIVE">
Active
</FilterLink>
{", "}
<FilterLink filter="SHOW_COMPLETED">
Completed
</FilterLink>
</p>
)
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
Container Component
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_ALL':
return todos
case 'SHOW_COMPLETED':
return todos.filter(t => t.completed)
case 'SHOW_ACTIVE':
return todos.filter(t => !t.completed)
}
}
const mapStateToProps = (state) => {
return {
todos: getVisibleTodos(state.todos, state.visibilityFilter)
}
}
const mapDispatchToProps = (dispatch) => {
return {
onTodoClick: (id) => {
dispatch(toggleTodo(id))
}
}
}
const VisibleTodoList = connect(
mapStateToProps,
mapDispatchToProps
)(TodoList)
export default VisibleTodoList
containers/FilterLink.js
import { connect } from 'react-redux'
import { setVisibilityFilter } from '../actions'
import Link from '../components/Link'
const mapStateToProps = (state, ownProps) => {
return {
active: ownProps.filter === state.visibilityFilter
}
}
const mapDispatchToProps = (dispatch, ownProps) => {
return {
onClick: () => {
dispatch(setVisibilityFilter(ownProps.filter))
}
}
}
const FilterLink = connect(
mapStateToProps,
mapDispatchToProps
)(Link)
export default FilterLink
其它 Component
containers/AddTodo.js
import React from 'react'
import { connect } from 'react-redux'
import { addTodo } from '../actions'
let 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>
)
}
AddTodo = connect()(AddTodo)
export default AddTodo