lovecoding
/
Web1020


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
    <style>
        .box {
            width: 100px;
            height: 100px;
            background-color: red;
            margin: 10px;
        }

    </style>
</head>

<body>
    <div id="app">
        <box v-on:comhandle="parentHandle" val="helloworld"></box>
        <!-- <box v-bind:val="str"></box> -->
        <h1>文本框里面的值:{{childVal}}</h1>
    </div>

    <template id="box-temp">
        <div class="container">
            <div class="box">
                <span>{{val}}</span>
                <input type="text" v-model="num">
                <button @click="emitVal">传参</button>
            </div>
        </div>
    </template>
   
    <script>
        let app = new Vue({
            el: '#app',
            data: {
                str:"lovecoding",
                childVal:""
            },
            methods: {
                parentHandle(i) {
                    this.childVal = i;
                    console.log("父组件接收到了子组件的参数",i);
                }
            },
            components: {
                box: {
                    template: "#box-temp",
                    // 组件内部的data是个函数 内部返回一个对象
                    data() {
                        return{
                            num:""
                        }
                    },
                    // props用来接受传递进来的参数
                    props:["val"],
                    methods: {
                        box1Handle() {
                            console.log(this.val)
                        },
                        emitVal(){
                            // 通过$emit触发父组件中的自定义事件
                            this.$emit("comhandle",this.num);
                            console.log(this.num)
                        }
                    }
                }
            }
        })
    </script>
</body>

</html>