对于我拥有的一些全局组件,我一直收到以下错误:
Failed to mount component: template or render function not defined.
found in
---> <Paginator>
<Root>
这就是我在package.json中所拥有的:
{
"version": "1.0.0",
"scripts": {
"dev": "cross-env NODE_ENV=development webpack",
"build": "cross-env NODE_ENV=production webpack --progress --hide-modules"
},
"dependencies": {
"vue": "^2.4.4"
},
"browserslist": [
"> 1%",
"last 2 versions",
"not ie <= 8"
],
"devDependencies": {
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-polyfill": "^6.23.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-stage-2": "^6.0.0",
"babel-preset-vue-app": "^1.2.0",
"babel-plugin-transform-runtime": "^6.0.0",
"cross-env": "^5.0.5",
"css-loader": "^0.28.7",
"file-loader": "^1.1.4",
"fs": "^0.0.1-security",
"node-sass": "^4.5.3",
"sass-loader": "^6.0.6",
"vue-loader": "^13.0.5",
"vue-template-compiler": "^2.4.4",
"webpack": "^3.6.0",
"webpack-dev-server": "^2.9.1"
}
}
在webpack.config中,我定义了以下内容:
resolve: {
alias: {
'vue$': 'vue/dist/vue.esm.js'
},
extensions: ['*', '.js', '.vue', '.json']
},
这是我的主要js文件:
import Vue from 'vue';
Vue.component('paginator', require('./components/Paginator.vue'));
var vm = new Vue({
el: '#root',
data: {}
});
HTML:
<div id="root>
<paginator v-bind:total-items="totalItems" v-bind:page-size="query.pageSize" v-bind:page="query.page" v-on:pagechanged="onPageChange"></paginator>
</div>
为什么我得到这个错误的任何想法?
当我按如下方式更改代码似乎有效时,我想将paginator注册为全局组件:
import Vue from 'vue';
import Paginator from './components/Paginator.vue';
var vm = new Vue({
el: '#root',
components: {
'paginator': Paginator
},
data: {}
});
这是分页器组件:
<template>
<div>
<div >
<nav>
<ul class="pagination">
...
</ul>
</nav>
</div>
</div>
</template>
<script>
export default {
props: ['totalItems', 'pageSize', 'page'],
data: function () {
return {
currentPage: 1,
}
},
computed: {
pages: function () {
this.currentPage = this.page;
var pageArray = [];
var pagesCount = Math.ceil(this.totalItems / this.pageSize);
for (var i = 1; i <= pagesCount; i++)
pageArray.push(i);
return pageArray;
}
},
methods: {
changePage: function (page){
this.currentPage = page;
this.$emit('pagechanged', page);
},
previous: function (){
if (this.currentPage == 1)
return;
this.currentPage--;
this.$emit('pagechanged', this.currentPage);
},
next: function () {
if (this.currentPage == this.pages.length)
return;
this.currentPage++;
this.$emit('pagechanged', this.currentPage);
}
},
}
答案 0 :(得分:1)
我相信这一行是问题 - 组件声明中的require
在使用它时并没有很好地结束(尽管我没有研究过为什么)。
编辑:有关此信息,请参阅@DecadeMoon回答。
Vue.component('paginator', require('./components/Paginator.vue'));
推荐方式:
import Paginator from './components/Paginator.vue'
Vue.component('paginator', Paginator);
您还可以执行以下操作之一,这将使webpack将模块异步拆分为单独的文件下载(这对大型组件非常有用)
选项1:
Vue.component('paginator', () => import('./components/Paginator.vue'));
选项2:
我有一个包装它的加载函数,因为它允许我传递一个字符串并包装目录而不必多次输入它,但这是我使用的那个函数的简单版本:
function load (component) {
return () => import(component)
}
所以它会变成:
Vue.component('paginator', load('./components/Paginator.vue'));
答案 1 :(得分:0)
这是Webpack结合require
(CommonJS)和import
(ES6)模块导入样式的结果。
我总是建议使用ES6风格的import
语法。
如果必须使用require
,则需要选择默认导入,如下所示:
Vue.component('paginator', require('./components/Paginator.vue').default);
^^^^^^^^
我建议使用ES6 import
语法(它是一种标准化的,非特定于webpack的语法):
import Paginator from './components/Paginator.vue';
Vue.component('paginator', Paginator);
import()
语法之所以有效,是因为this issue。如果您希望将模块拆分为单独的文件并由Webpack异步下载,则仅使用import()
。