React+Redux实现简单的待办事项列表ToDoList

来源:互联网 发布:中国技术贸易数据 编辑:程序博客网 时间:2024/05/18 20:32

【本文源址:http://blog.csdn.net/q1056843325/article/details/54809630 转载请添加该地址】

使用Redux做了一个简单的ToDoList待办事项列表
这个例子也是源于Redux作者Dan Abramov的视频demo
还要特别说明一下
我还没有使用react-redux库进行解耦(可能以后加)
也没有拆分成多个文件等等优化
为了单纯的练习redux
适合初步学习redux的同学
本人学疏才浅,发现可以优化的地方或者问题还请大家指正,谢谢

功能样式

样子就是这样的
在输入框输入待办事项
功能很简单
鼠标点击Add或者键盘按下Enter输出
ShowAll显示全部待办事项
ShowActive显示未完成的待办事项(未划掉的)
ShowCrossed显示已完成的待办事项(划掉的)

配置文件

使用Webpack构建的文件夹如下

webpack.config.js配置文件

module.exports = {    entry: {        index: './src/js/entry.js'    },    output: {        path: './static/dist/',        publicPath: 'http://localhost:8080/static/dist/',        filename: '[name].js'    },    module: {        loaders: [            {                test: /\.js$/,                loader: 'babel',                exclude:/node_modules/,                query: {                    presets: ['react', 'es2015']                }            },            {                test: /.less$/,                loader: 'style!css!less'            }        ]    }}

package.json的依赖项

{  "name": "react-demo",  "version": "1.0.0",  "description": "",  "main": "webpack.config.js",  "scripts": {    "test": "echo \"Error: no test specified\" && exit 1",    "diy": "webpack-dev-server --progress --colors --devtool sourcemap"  },  "author": "Payson",  "license": "ISC",  "devDependencies": {    "babel-core": "^6.22.1",    "babel-loader": "^6.2.10",    "babel-preset-es2015": "^6.22.0",    "babel-preset-react": "^6.22.0",    "css-loader": "^0.26.1",    "jquery": "^3.1.1",    "less": "^2.7.2",    "less-loader": "^2.2.3",    "react": "^15.4.2",    "react-dom": "^15.4.2",    "react-redux": "^5.0.2",    "redux": "^3.6.0",    "style-loader": "^0.13.1",    "webpack": "^1.14.0",    "webpack-dev-server": "^1.16.2"  }}

html文件

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>React</title></head><body>    <div id="root"></div>    <script src="http://localhost:8080/static/dist/index.js"></script></body> </html>

脚本文件

没有细拆文件
直接写在入口文件entry.js了
注释就写在代码里了

require('../less/index.less'); //行间样式受限制不能添加伪类伪元素,所以还是添加了less(css)控制样式import React from 'react';import {Component} from 'react'import ReactDom from 'react-dom';import {createStore, combineReducers} from 'redux';class ToDoList extends Component {  addHandler(){ //添加待办事项的listener    let Inp = this.refs.Inp; //获取真实DOM的输入value    if(!Inp.value){ //如果没有输入值,直接返回      return;    }    store.dispatch( //dispatch一个添加项目的action,并传入输入数据      {        type: 'ADD_ITEM',        newItem: Inp.value      }    )    Inp.value = ''; //提交后,清空输入    Inp.focus(); //重置输入焦点  }  toggleHandler(item){ //Action Creator:负责提交切换中划线的action    store.dispatch(      {        type: 'TOGGLE_ITEM',        changeID: item.ID      }    );  }  showAllHandler(){ //Action Creator:负责showAll的action    store.dispatch(      {        type: 'SET_FILTER',        filter: 'SHOW_ALL'      }    );  }  showActiveHandler(){ //Action Creator:负责showActive的action    store.dispatch(      {        type: 'SET_FILTER',        filter: 'SHOW_ACTIVE'      }    );  }  showCrossedHandler(){ //Action Creator:负责showCrossed的action    store.dispatch(      {        type: 'SET_FILTER',        filter: 'SHOW_CROSSED'      }    );  }  render(){ //渲染结构样式    let _this = this; //缓存this    let state = store.getState(); //缓存store的快照--state    let {list, option} = state; //解构赋值获取两个子state    //list是一个数组,内部数组元素是对象表示每一个列表项    //option是一个字符串,表示当先选择的选项    switch(option){ //通过判断当前的option字符串来决定是否过滤list数组      case 'SHOW_ACTIVE':        list = list.filter(function(item){          return !item.del;        });        break;      case 'SHOW_CROSSED':        list = list.filter(function(item){          return item.del;        });        break;    }    document.body.addEventListener('keydown', function(e){      if(e.which == 13){        _this.addHandler();      }    }); //绑定键盘enter事件    return (      <div>        <input type="text" ref="Inp"/> //设置ref属性为了获取真实DOM节点        <button onClick={_this.addHandler.bind(_this)}>Add</button>        <ul className="option">          <li onClick={_this.showAllHandler.bind(_this)}>            <span style={{textDecoration: option!='SHOW_ALL' ? 'underline' : 'none'}}>ShowAll</span>          </li>          <li onClick={_this.showActiveHandler.bind(_this)}>            <span style={{textDecoration: option!='SHOW_ACTIVE' ? 'underline' : 'none'}}>ShowActive</span>          </li>          <li onClick={_this.showCrossedHandler.bind(_this)}>            <span style={{textDecoration: option!='SHOW_CROSSED' ? 'underline' : 'none'}}>ShowCrossed</span>          </li> //判断option字符串来决定三个选项的样式        </ul>        <ul className="list">          {            list.map(function(item, index){ //通过list数组map映射为虚拟DOM节点              return <li key={index}>                        <span style={{textDecoration: item.del ? 'line-through': 'none'}}                         onClick={_this.toggleHandler.bind(_this, item)}>{item.item}</span>                     </li>            })          }        </ul>      </div>    )  }}const list = (state = [], action) => { //list-reducer  switch(action.type){    case 'ADD_ITEM':      return [        ...state,         {          item: action.newItem, //列表项内容          ID: state.length, //列表项ID          del: false //列表项是否已划掉        }      ];    case 'TOGGLE_ITEM':      return state.map((item)=>{        return Object.assign({},item,{          del: action.changeID == item.ID ? !item.del : item.del        });      });    default:      return state;  }}const option = (state = 'SHOW_ALL', action) => { //option-reducer  switch(action.type){    case 'SET_FILTER':      return action.filter;    default:      return state;  }}const reducer = combineReducers({list, option}); //利用redux库API-combineReducers()合并reducerconst store = createStore(reducer); //利用redux库API-createStore()创建storeconst render = () => { //自定义的渲染函数  ReactDom.render(    <ToDoList/>,    document.getElementById('root')  );}store.subscribe(render); //绑定render函数,每次state更新时执行render(); //首次渲染

样式文件

index.less文件加一些样式控制

.option {    list-style-type: none;    padding: 0;    margin-top: 5px;    font-size: 13px;    li {        float: left;        margin-right: 15px;        span {            cursor: pointer;            font-weight: bold;        }    }    &::after {        content: '';        display: block;        clear: both;    }}.list {    li {        span {            &:hover {                color: #f40;                cursor: pointer;            }            &::selection {                color: #000;                background-color: #fff;            }        }    }}

==主页传送门==

6 0
原创粉丝点击