怎么在Vue.js中实现组件间的循环引用?相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。
main.js
import Vue from 'vue' import App from './App' new Vue({ el: '#app', template: '<App/>', components: { App } })
main.js 导入 App 组件,并在 components 中注册 App 组件。
App.vue
<template> <div id="app"> <li v-for="folder in folders"> <tree-folder v-bind:folder="folder"></tree-folder> </li> </div> </template> <script> import TreeFolder from './components/tree-folder' export default { data: function () { return { folders: [ { name: 'folder1', children: [{ name: 'folder1 - folder1', children: [{ name: 'folder1 - folder1 - folder1' }] }, { name: 'folder1 - folder2', children: [{ name: 'folder1 - folder2 - folder1' }, { name: 'folder1 - folder2 - folder2' }] }] }, { name: 'folder 2', children: [{ name: 'folder2 - folder1', children: [{ name: 'folder2 - folder1 - folder1' }] }, { name: 'folder2 - folder2', children: [{ name: 'folder2-content1' }] }] }, { name: 'folder 3', children: [{ name: 'folder3 - folder1', children: [{ name: 'folder3 - folder1 - folder1' }] }, { name: 'folder3 - folder2', children: [{ name: 'folder3-content1' }] }] } ] } }, components: { TreeFolder } } </script>
App 组件导入 TreeFolder 组件,并在 components 中注册 TreeFolder 组件。
components/tree-folder.vue
<template> <p> <span>{{ folder.name }}</span> <tree-folder-contents :children="folder.children"></tree-folder-contents> </p> </template> <script> // 官方文档:「在我们的例子中,将 tree-folder 组件做为切入起点。我们知道制造矛盾的是 tree-folder-contents 子组件,所以我们在 tree-folder 组件的生命周期钩子函数 beforeCreate 中去注册 tree-folder-contents 组件」 export default { props: ['folder'], data: function () { return {} }, beforeCreate: function () { // 官方文档给出的是require // this.$options.components.TreeFolderContents = require('./tree-folder-contents.vue') // 在基于vue-cli@2.8.1按照上面的写法还是会报错 // Failed to mount component: template or render function not defined. // 所以我们应该改为基于es6的写法异步加载一个组件如下 this.$options.components.TreeFolderContents = () => import('./tree-folder-contents.vue') } } </script>
TreeFolder 组件导入 TreeFolderContents 组件,并在 components 中注册 TreeFolderContents 组件。
components/tree-folder-contents.vue
<template> <ul> <li v-for="child in children"> <tree-folder v-if="child.children" :folder="child"></tree-folder> <span v-else>{{ child.name }}</span> </li> </ul> </template> <script> import TreeFolder from './tree-folder' export default { props: ['children'], components: { TreeFolder } } </script>
TreeFolderContents 组件又导入 TreeFolder 组件,并在 components 中注册 TreeFolder 组件,产生了循环引用。
看完上述内容,你们掌握怎么在Vue.js中实现组件间的循环引用的方法了吗?如果还想学到更多技能或想了解更多相关内容,欢迎关注亿速云行业资讯频道,感谢各位的阅读!
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