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Vue2.5开发去哪儿网App 第二章笔记

2019年02月17日  | 移动技术网IT编程  | 我要评论

vue完成  todolist

1.默认方式

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>todolist</title>
    <script src="../../vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="inputvalue">
        <button v-on:click="additem">添加</button>
        <ul>
            <li v-for="item in list">{{ item }}</li>
        </ul>
    </div>
    <script>
        var app = new vue({
            el:'#app',
            data:{
                list:[],
                inputvalue:''
            },
            methods:{
                additem:function () {
                    this.list.push(this.inputvalue)
                    this.inputvalue = ''
                }
            }
        })
        console.log(app.$data)
    </script>
</body>
</html>
view code

2.以全局组件的方式

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>title</title>
    <script src="../../vue.js"></script>
</head>
<body>
<div id="app">
    <input type="text" v-model="inputvalue">
        <button v-on:click="additem">添加</button>
    <tode-item v-bind:content="item" v-for="item in list"></tode-item>
</div>
<script>
    var myconponent = vue.extend({
        props:['content'],
        template:"<li>{{content}}</li>"
    })

    vue.component('tode-item',myconponent)

    var app = new vue({
        el:'#app',
        data:{
            list:[],
            inputvalue:''
        },
        methods:{
            additem:function () {
                this.list.push(this.inputvalue)
                this.inputvalue = ''
            }
        }
    })
</script>
</body>
</html>
view code

3.以局部组件的方式

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>局部组件 todolist</title>
    <script src="../../vue.js"></script>
</head>
<body>
<div id="app">
    <input type="text" v-model="inputvalue">
    <button v-on:click="additem">添加</button>
    <todo-item v-bind:content="item" v-for="item in list"></todo-item>
</div>
<script>
    var myconponent = {
        props:['content'],
        template:"<li>{{content}}</li>"
    }
    var app = new vue({
        el:'#app',
        components:{
            'todo-item':myconponent
        },
        data:{
            list:[],
            inputvalue:''
        },
        methods:{
            additem:function () {
                this.list.push(this.inputvalue)
                this.inputvalue = ''
            }
        }
    })
</script>
</body>
</html>
view code

vue 组件间传值

子组件向父组件传值

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>局部组件 todolist</title>
    <script src="../../vue.js"></script>
</head>
<body>
<div id="app">
    <input type="text" v-model="inputvalue">
    <button v-on:click="additem">添加</button>
    <!--v-bind简写：:  v-on:  @-->
    <todo-item :content="item" :index="index" @delete="handleitemdelete" v-for="(item,index) in list"></todo-item>
</div>
<script>
    var myconponent = {
        props:['content','index'],
        template:"<li @click='handleitemclick'>{{content}}</li>",
        methods:{
            handleitemclick:function () {
                this.$emit('delete',this.index)
            }
        }
    }
    var app = new vue({
        el:'#app',
        components:{
            'todo-item':myconponent
        },
        data:{
            list:[],
            inputvalue:''
        },
        methods:{
            additem:function () {
                this.list.push(this.inputvalue)
                this.inputvalue = ''
            },
            handleitemdelete:function (index) {
                console.log(index)
                this.list.splice(index,1)
            }
        }
    })
</script>
</body>
</html>
view code

 

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