vue.js实战 第一篇 第七章 组件详解_组件通信

<div id="app">
    <my-component message="来自父组件的数据"></my-component>
</div>
<script>
    Vue.component(‘my-component‘,{
        props:[‘message‘],
        template:‘<div>{{message}}</div>‘
    });
    var app=new Vue({
        el:‘#app‘
    })
</script>

<div id="app">
    <input type="text" v-model="parentMessage">
    <mc :message="parentMessage"></mc>
</div>

<mc message="parentMessage"></mc>

<div id="app">
    <mc :init-count="1"></mc>
</div>
<script>
    Vue.component(‘mc‘,{
        props:[‘initCount‘],
        template:‘<div>{{count}}</div>‘,
        data:function(){
            return{
                count:this.initCount
            }
        }
    });
</script>

<div id="app">
    <mc :width="100"></mc>
</div>
<script>
    Vue.component(‘mc‘,{
        props:[‘width‘],
        template:‘<div :style="style">content</div>‘,
        computed:{
            style:function(){
                return width:this.width+‘px‘
            }
        }
    })
</script>

<script>
    Vue.component(‘mc‘,{
        props:{
            propA:Number,
            propB:[String,Number],
            propC:{
                type:Boolean,
                default:true
            },
            propD:{
                type:Number,
                required:true
            },
            propE:{
                type:Array,
                default:function(){
                    return [];
            },
            propF:{
                validator:function(value){
                    return value>10;
                }
            }
        }
    })
</script>

<div id="app">
    <p>total:{{total}}</p>
    <mc @increase="handleGetTotal" @reduce="handleGetTotal"></mc>
</div>
<script>
    Vue.component(‘mc‘,{
        template:‘        <div>            <button @click="handleIncrease">+1</button>            <button @click="handleReduce">-1</button>        </div>‘,
        data:function(){
            return{
                counter:0
            }
        },
        methods:{
            handleIncrease:function(){
                this.counter++;
                this.$emit(‘increase‘,this.counter);
            },
            handleReduce:function(){
                this.counter--;
                this.$emit(‘reduce‘,this.counter);
            }
        }
    });
    var app=new Vue({
        el:‘#app‘,
        data:{
            total:0
        },
        methods:{
            handleGetTotal:function(total){
                this.total=total;
            }
        }
    })
</script>

<div id="app">
    <p>total:{{total}}</p>
　　<mc v-model="total"></mc>

</div>
<script>
    Vue.component(‘mc‘,{
        template:‘<button @click="handleClick">+1</button>‘,
        data:function(){
            return {counter:0}
        },
        methods:{
            handleClick:function(){
                this.counter++;
                this.$emit(‘input‘,this.counter);
            }
        }
    });
    var app=new Vue({
        el:‘#app‘,
        data:{total:0}
    })
</script>

<div id="app">
    <p>total:{{total}}</p>
    <mc v-model="total"></mc>
    <button @click="handleReduce">-1</button>
</div>
<script>
    Vue.component(‘mc‘,{
        props:[‘value‘],
        template:‘<input :value="value" @input="updateValue">‘,
        methods:{
            updateValue:function(event){
                this.$emit(‘input‘,event.target.value);
            }
        }
    });
    var app=new Vue({
        el:‘#app‘,
        data:{total:0},
        methods:{
            handleReduce:function(){
                this.total--;
            }
        }
    })
</script>

<div id="app">
    {{message}}
    <mc></mc>
</div>
<script>
    var bus=new Vue();

    Vue.component(‘mc‘,{
        template:‘<button @click="handleEvent">传递事件</button>‘,
        methods:{
            handleEvent:function(){
                bus.$emit(‘on-message‘,‘来自组件mc的内容‘);
            }
        }
    });
    var app=new Vue({
        dl:‘#app‘,
        data:{message:‘‘},
        mounted:function(){
            var _this=this;
            bus.$on(‘on-message‘,function(msg){
                _this.message=msg;
            }
        }
    })
</script>