8.Vue基础

 环境搭建

node.js安装

https://nodejs.org/en/

cnpm

npm install -g cnpm --registry=https://registry.npm.taobao.org

cpnm全局安装vue-cli

cnpm install -g vue-cli

 目录下创建一个基于 webpack 模板的新项目

vue init webpack my-first-project

设置项目名字、作者......

然后 cd my-first-project  进到项目目录里面，安装项目依赖

cnpm install

可以看到my-vue-project文件夹下多了一个node_modules文件

运行项目

使用命令npm run dev 运行项目

cnpm run dev

项目运行成功后浏览器访问地址

http://127.0.0.1:8080/

 sublime3安装插件vue syntax hightlight ，vue语法高亮显示。

to do list

<template>
  <div id="app">
    <h1 v-text="title"></h1>
    <input v-model="newItem" v-on:keyup.enter="addNew">
    <ol> 
      <li v-for="item in items" v-bind:class="{finished:item.isFinished}" v-on:click="toggleFinish(item)">
      {{item.label}}
      </li>
    </ol>
    
  </div>
</template>

<script>
import Store from './store.js'
export default {
  name: 'todo list',
  data () {
    return {
      title: 'this is a todo list',
      items:Store.fetch(),
      newItem:''
    }
  },
  watch:{
    items:{
      handler:function(items){
        Store.save(items)
      },
      deep:true
    }
  },
  methods:{
    toggleFinish:function(item){
      item.isFinished = !item.isFinished
    },
    addNew:function(){
      this.items.push({
        label:this.newItem,
        isFinished:false
      })
      this.newItem = ''
    }
  }
}
</script>

<style>
.finished{
  text-decoration: underline;
  color:blue;
}


#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

store.js

const STORAGE_KEY = 'todos-vuejs'

export default {

 fetch: function() {

  return window.JSON.parse(window.localStorage.getItem(STORAGE_KEY) || '[]')

 },

 save: function(items) {

  window.localStorage.setItem(STORAGE_KEY, window.JSON.stringify(items))

 }

}