vue子组件通过事件向父级组件发送消息怎么不成功啊

初学vue，照着官网实例敲的，怎么点击按钮字体没有变大啊

Html代码：

<body><div id="blog-posts-events-demo">
    <div :style="{ fontSize: postFontSize + 'em' }">
        <blog-post
                v-for="post in posts"
                v-bind:key="post.id"
                v-bind:post="post"
        ></blog-post>
    </div></div></body>

js代码

 Vue.component('blog-post', {
        props: ['post'],
        template: `
    <div class="blog-post" v-on:enlarge-text="postFontSize+=0.1">
      <h3>{{ post.title }}</h3>
      <button v-on:click="$emit('enlarge-text')">
        Enlarge text
      </button>
      <div v-html="post.content"></div>
    </div>`
    })
    
    let a = new Vue({
        el: '#blog-posts-events-demo',
        data: {
            posts: [
                {id: 1, content: 'My journey with Vue', title: '1'},
                {id: 2, content: 'Blogging with Vue', title: '2'},
                {id: 3, content: 'Why Vue is so fun', title: '3'}
            ],
            postFontSize: 1
        }
    })

LEATH

浏览 514回答 1

1回答

随时随地看视频慕课网APP