一个页面里，包括两个子组件，通过执行一个子组件的方法改变另一个子组件的数据

实例：根据分类id查询博客内容

父页面代码：

<template><el-container><el-header>Header</el-header><el-container><el-aside width="200px"><classification></classification></el-aside><el-container><el-main><blog></blog><!-- {{classificationId}} --></el-main><el-footer>Footer</el-footer></el-container><el-aside width="200px">Aside</el-aside></el-container></el-container>
</template><script>import classification from "@/views/reception/classification"import blog from "@/views/reception/blog"export default{components: {classification,blog},data() {return {classificationId:&#