vue起步

1.first demo render a String

<div id="app">
{{ message }}
</div>
var app = new Vue({
  el: '#app',
  data: {
      message: 'Hello Vue!'
  }
})

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2.指令-绑定元素属性

<div id="app-2">
  <span v-bind:title="message">
    Hover your mouse over me for a few seconds to see my dynamically bound title!
  </span>
</div>
var app2 = new Vue({
  el: '#app-2',
  data: {
    message: 'You loaded this page on ' + new Date()
  }
})

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其他指令

<div id="app-3">
  <p v-if="seen">Now you see me</p>
</div>
var app3 = new Vue({
  el: '#app-3',
  data: {
    seen: true
  }
})

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<div id="app-4">
  <ol>
    <li v-for="todo in todos">
      {{ todo.text }}
    </li>
  </ol>
</div>
var app4 = new Vue({
  el: '#app-4',
  data: {
    todos: [
      { text: 'Learn JavaScript' },
      { text: 'Learn Vue' },
      { text: 'Build something awesome' }
    ]
  }
})

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4.绑定事件 处理用户请求

<div id="app-5">
  <p>{{ message }}</p>
  <button v-on:click="reverseMessage">Reverse Message</button>
</div>
var app5 = new Vue({
  el: '#app-5',
  data: {
    message: 'Hello Vue.js!'
  },
  methods: {
    reverseMessage: function () {
      this.message = this.message.split('').reverse().join('')
    }
  }
})

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5.v-model 数据双向绑定

<div id="app-6">
  <p>{{ message }}</p>
  <input v-model="message">
</div>
var app6 = new Vue({
  el: '#app-6',
  data: {
    message: 'Hello Vue!'
  }
})

5.组件

// Define a new component called todo-item
Vue.component('todo-item', {
  template: '<li>This is a todo</li>'
})
//Now you can compose it in another component’s template:

<ul>
  <!--
  Create an instance of the todo-item component
  -->
  <todo-item></todo-item>
</ul>

组件传值

Vue.component('todo-item', {
// The todo-item component now accepts a
// "prop", which is like a custom attribute.
// This prop is called todo.
props: ['todo'],
    template: '<li>{{ todo.text }}</li>'
})

现在可以传递todo数据

<div id="app-7">
  <ol>
    <!--
    Now we provide each todo-item with the todo object
    it's representing, so that its content can be dynamic
    -->
    <todo-item v-for="todo in todos" v-bind:todo="todo"></todo-item>
  </ol>
</div>
var app7 = new Vue({
  el: '#app-7',
  data: {
    todos: [
      { text: 'Learn JavaScript' },
      { text: 'Learn Vue' },
      { text: 'Build something awesome' }
    ]
  }
})

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可以把应用看成是组件的形式

<div id="app">
  <app-nav></app-nav>
  <app-view>
    <app-sidebar></app-sidebar>
    <app-content></app-content>
  </app-view>
</div>