Vue起步

1 Hello world

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Hello World</title>
  <script type="text/javascript" src="./vue.js"></script>
</head>
<body>
    <div id="app">{{content}}</div>
    <script type="text/javascript">
        // var dom = document.getElementById('app');
        // dom.innerHTML = "hello world"
        // setTimeout(function(){
        //  dom.innerHTML = 'bye world'
        // },2000)
        var app = new Vue({
            el: '#app',
            data: {
                content: 'hello world'
            }
        })
        setTimeout(function() {
            app.$data.content = 'bye world'
        }, 2000)
    </script>
</body>
</html>

2 TodoList

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>TodoList</title>
  <script type="text/javascript" src="./vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" name="" v-model="inputValue">
        <button v-on:click="handleBtnClick">提交</button>
        <ul>
            <li v-for="item in list">{{item}}</li>
        </ul>
    </div>
    <script type="text/javascript">
        var app = new Vue({
            el: '#app',
            data: {
                list: [],
                inputValue: ''
            },
            methods: {
                handleBtnClick: function(){
                    // alert(this.inputValue);
                    this.list.push(this.inputValue)
                    this.inputValue = ''
                }
            }
        })
    </script>
</body>
</html>

3 TodoList 改进

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>TodoList</title>
  <script type="text/javascript" src="./vue.js"></script>
</head>
<body>
    <div id="root">
        <input type="text" name="" v-model="todoValue">
        <button @click="handleBtnClick">提交</button>
        <ul>
            <todo-item v-bind:content="item"   
                       v-bind:index="index"
                       v-for="(item,index) in list"
                       @delete="handleItemClick">
                            
            </todo-item>
        </ul>
    </div>
    <script type="text/javascript">
        
        // 全局组件
        // Vue.component("TodoItem",{
        //  props: ['content'],
        //  template: "<li>{{content}}</li>"
        // })

        // 局部组件
        var TodoItem = {
            props: ['content', 'index' ],
            template: "<li @click='handleItemClick'>{{content}}</li>",
            methods: {
                handleItemClick: function(){
                    this.$emit("delete", this.index)  // 子组件向父组件传值
                }
            }
        }

        var app = new Vue({
            el: '#root',
            components:{    // 局部组件的注册
                'TodoItem': TodoItem   
            },
            data: {
                list: [],
                todoValue: ''
            },
            methods: {
                handleBtnClick: function(){
                    // alert(this.todoValue);
                    this.list.push(this.todoValue)
                    this.todoValue = ''
                },
                handleItemClick: function(index){
                    this.list.splice(index, 1)
                }
            }
        })
    </script>
</body>
</html>

Vue起步

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