前端-vue基础61-子组件向父组件传值

 

<!DOCTYPE html>
<html lang="en">
 
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
 
<body>
    <div id="app">
        <div :style='{fontSize:fontSize+"px"}'>{{pmsg}}</div>
 
        <menu-item :parr='parr' @enlarge-text='handle'></menu-item>
    </div>
    <script type="text/javascript" src="./js/vue.js"></script>
    <script>
        Vue.component('menu-item', {
            props: ['parr'],
 
            template: `<div>><ul><li :key="index" v-for="(item,index) in parr">{{item}}</li></ul>
            <button @click='parr.push("lemon")'>点击</button>
            <button @click='$emit("enlarge-text")'>扩大</button>
            </div>`
        });
        var vm = new Vue({
            el: '#app',
            data: {
                pmsg: '父亲组件内容',
                pstr: 'hello',
                parr: ['apple', 'orange', 'banana'],
                fontSize: 10
 
            },
            methods: {
                handle: function() {
                    this.fontSize += 10;
                }
            }
        })
    </script>
</body>
 
</html>

 

posted @ 2022-07-23 22:30  前端导师歌谣  阅读(42)  评论(0)    收藏  举报