React-Flux 介绍及实例演示

一、Flux架构

二、例子

1.TodoApp.react.js

 1 /**
 2  * Copyright (c) 2014-2015, Facebook, Inc.
 3  * All rights reserved.
 4  *
 5  * This source code is licensed under the BSD-style license found in the
 6  * LICENSE file in the root directory of this source tree. An additional grant
 7  * of patent rights can be found in the PATENTS file in the same directory.
 8  */
 9 
10 /**
11  * This component operates as a "Controller-View".  It listens for changes in
12  * the TodoStore and passes the new data to its children.
13  */
14 
15 var Footer = require('./Footer.react');
16 var Header = require('./Header.react');
17 var MainSection = require('./MainSection.react');
18 var React = require('react');
19 var TodoStore = require('../stores/TodoStore');
20 
21 /**
22  * Retrieve the current TODO data from the TodoStore
23  */
24 function getTodoState() {
25   return {
26     allTodos: TodoStore.getAll(),
27     areAllComplete: TodoStore.areAllComplete()
28   };
29 }
30 
31 var TodoApp = React.createClass({
32 
33   getInitialState: function() {
34     return getTodoState();
35   },
36 
37   componentDidMount: function() {
38     TodoStore.addChangeListener(this._onChange);
39   },
40 
41   componentWillUnmount: function() {
42     TodoStore.removeChangeListener(this._onChange);
43   },
44 
45   /**
46    * @return {object}
47    */
48   render: function() {
49     return (
50       <div>
51         <Header />
52         <MainSection
53           allTodos={this.state.allTodos}
54           areAllComplete={this.state.areAllComplete}
55         />
56         <Footer allTodos={this.state.allTodos} />
57       div>
58     );
59   },
60 
61   /**
62    * Event handler for 'change' events coming from the TodoStore
63    */
64   _onChange: function() {
65     this.setState(getTodoState());
66   }
67 
68 });
69 
70 module.exports = TodoApp;

2.TodoActions.js

 1 /*
 2  * Copyright (c) 2014-2015, Facebook, Inc.
 3  * All rights reserved.
 4  *
 5  * This source code is licensed under the BSD-style license found in the
 6  * LICENSE file in the root directory of this source tree. An additional grant
 7  * of patent rights can be found in the PATENTS file in the same directory.
 8  *
 9  * TodoActions
10  */
11 
12 var AppDispatcher = require('../dispatcher/AppDispatcher');
13 var TodoConstants = require('../constants/TodoConstants');
14 
15 var TodoActions = {
16 
17   /**
18    * @param  {string} text
19    */
20   create: function(text) {
21     AppDispatcher.dispatch({
22       actionType: TodoConstants.TODO_CREATE,
23       text: text
24     });
25   },
26 
27   /**
28    * @param  {string} id The ID of the ToDo item
29    * @param  {string} text
30    */
31   updateText: function(id, text) {
32     AppDispatcher.dispatch({
33       actionType: TodoConstants.TODO_UPDATE_TEXT,
34       id: id,
35       text: text
36     });
37   },
38 
39   /**
40    * Toggle whether a single ToDo is complete
41    * @param  {object} todo
42    */
43   toggleComplete: function(todo) {
44     var id = todo.id;
45     var actionType = todo.complete ?
46         TodoConstants.TODO_UNDO_COMPLETE :
47         TodoConstants.TODO_COMPLETE;
48 
49     AppDispatcher.dispatch({
50       actionType: actionType,
51       id: id
52     });
53   },
54 
55   /**
56    * Mark all ToDos as complete
57    */
58   toggleCompleteAll: function() {
59     AppDispatcher.dispatch({
60       actionType: TodoConstants.TODO_TOGGLE_COMPLETE_ALL
61     });
62   },
63 
64   /**
65    * @param  {string} id
66    */
67   destroy: function(id) {
68     AppDispatcher.dispatch({
69       actionType: TodoConstants.TODO_DESTROY,
70       id: id
71     });
72   },
73 
74   /**
75    * Delete all the completed ToDos
76    */
77   destroyCompleted: function() {
78     AppDispatcher.dispatch({
79       actionType: TodoConstants.TODO_DESTROY_COMPLETED
80     });
81   }
82 
83 };
84 
85 module.exports = TodoActions;

3.AppDispatcher.js

 1 /*
 2  * Copyright (c) 2014-2015, Facebook, Inc.
 3  * All rights reserved.
 4  *
 5  * This source code is licensed under the BSD-style license found in the
 6  * LICENSE file in the root directory of this source tree. An additional grant
 7  * of patent rights can be found in the PATENTS file in the same directory.
 8  *
 9  * AppDispatcher
10  *
11  * A singleton that operates as the central hub for application updates.
12  */
13 
14 var Dispatcher = require('flux').Dispatcher;
15 
16 module.exports = new Dispatcher();

4.TodoStore.js

  1 /*
  2  * Copyright (c) 2014, Facebook, Inc.
  3  * All rights reserved.
  4  *
  5  * This source code is licensed under the BSD-style license found in the
  6  * LICENSE file in the root directory of this source tree. An additional grant
  7  * of patent rights can be found in the PATENTS file in the same directory.
  8  *
  9  * TodoStore
 10  */
 11 
 12 var AppDispatcher = require('../dispatcher/AppDispatcher');
 13 var EventEmitter = require('events').EventEmitter;
 14 var TodoConstants = require('../constants/TodoConstants');
 15 var assign = require('object-assign');
 16 
 17 var CHANGE_EVENT = 'change';
 18 
 19 var _todos = {};
 20 
 21 /**
 22  * Create a TODO item.
 23  * @param  {string} text The content of the TODO
 24  */
 25 function create(text) {
 26   // Hand waving here -- not showing how this interacts with XHR or persistent
 27   // server-side storage.
 28   // Using the current timestamp + random number in place of a real id.
 29   var id = (+new Date() + Math.floor(Math.random() * 999999)).toString(36);
 30   _todos[id] = {
 31     id: id,
 32     complete: false,
 33     text: text
 34   };
 35 }
 36 
 37 /**
 38  * Update a TODO item.
 39  * @param  {string} id
 40  * @param {object} updates An object literal containing only the data to be
 41  *     updated.
 42  */
 43 function update(id, updates) {
 44   _todos[id] = assign({}, _todos[id], updates);
 45 }
 46 
 47 /**
 48  * Update all of the TODO items with the same object.
 49  * @param  {object} updates An object literal containing only the data to be
 50  *     updated.
 51  */
 52 function updateAll(updates) {
 53   for (var id in _todos) {
 54     update(id, updates);
 55   }
 56 }
 57 
 58 /**
 59  * Delete a TODO item.
 60  * @param  {string} id
 61  */
 62 function destroy(id) {
 63   delete _todos[id];
 64 }
 65 
 66 /**
 67  * Delete all the completed TODO items.
 68  */
 69 function destroyCompleted() {
 70   for (var id in _todos) {
 71     if (_todos[id].complete) {
 72       destroy(id);
 73     }
 74   }
 75 }
 76 
 77 var TodoStore = assign({}, EventEmitter.prototype, {
 78 
 79   /**
 80    * Tests whether all the remaining TODO items are marked as completed.
 81    * @return {boolean}
 82    */
 83   areAllComplete: function() {
 84     for (var id in _todos) {
 85       if (!_todos[id].complete) {
 86         return false;
 87       }
 88     }
 89     return true;
 90   },
 91 
 92   /**
 93    * Get the entire collection of TODOs.
 94    * @return {object}
 95    */
 96   getAll: function() {
 97     return _todos;
 98   },
 99 
100   emitChange: function() {
101     this.emit(CHANGE_EVENT);
102   },
103 
104   /**
105    * @param {function} callback
106    */
107   addChangeListener: function(callback) {
108     this.on(CHANGE_EVENT, callback);
109   },
110 
111   /**
112    * @param {function} callback
113    */
114   removeChangeListener: function(callback) {
115     this.removeListener(CHANGE_EVENT, callback);
116   }
117 });
118 
119 // Register callback to handle all updates
120 AppDispatcher.register(function(action) {
121   var text;
122 
123   switch(action.actionType) {
124     case TodoConstants.TODO_CREATE:
125       text = action.text.trim();
126       if (text !== '') {
127         create(text);
128         TodoStore.emitChange();
129       }
130       break;
131 
132     case TodoConstants.TODO_TOGGLE_COMPLETE_ALL:
133       if (TodoStore.areAllComplete()) {
134         updateAll({complete: false});
135       } else {
136         updateAll({complete: true});
137       }
138       TodoStore.emitChange();
139       break;
140 
141     case TodoConstants.TODO_UNDO_COMPLETE:
142       update(action.id, {complete: false});
143       TodoStore.emitChange();
144       break;
145 
146     case TodoConstants.TODO_COMPLETE:
147       update(action.id, {complete: true});
148       TodoStore.emitChange();
149       break;
150 
151     case TodoConstants.TODO_UPDATE_TEXT:
152       text = action.text.trim();
153       if (text !== '') {
154         update(action.id, {text: text});
155         TodoStore.emitChange();
156       }
157       break;
158 
159     case TodoConstants.TODO_DESTROY:
160       destroy(action.id);
161       TodoStore.emitChange();
162       break;
163 
164     case TodoConstants.TODO_DESTROY_COMPLETED:
165       destroyCompleted();
166       TodoStore.emitChange();
167       break;
168 
169     default:
170       // no op
171   }
172 });
173 
174 module.exports = TodoStore;

 

转载于:https://www.cnblogs.com/shamgod/p/5061931.html