Vue ssr失败，渲染的html为undefined

Question

想试着写一个ssr demo，不带路由，不带数据预取的。官网文档中的基本用法demo的照写了运行没问题，但当我想换成组件式开发的时候就出问题了，渲染出来的页面是空的，这是我的代码，麻烦帮忙看看这是entry-client.jsimport { createApp } from './app'const { app } = createApp()app.$mount('#app')这是entry-server.jsimport { createApp } from './app'export default context => {  const { app } = createApp()  return app}这是app.jsimport Vue from 'vue'import App from '../../component/test/App.vue'export function createApp () {  const app = new Vue({    render: h => h(App)  })  return { app }}这是server.jsconst server = require('express')()const { createBundleRenderer } = require('vue-server-renderer')const renderer = createBundleRenderer('./dist/vue-ssr-server-bundle.json', {  runInNewContext: false,   template: require('fs').readFileSync('./views/test/test.html', 'utf-8')})server.get('*', (req, res) => {  renderer.renderToString( (err, html) => {    res.end(html)  })}).listen(8899)这是webpack打包服务端的代码const merge = require('webpack-merge')const nodeExternals = require('webpack-node-externals')const baseConfig = require('./webpack.common.js')const VueSSRServerPlugin = require('vue-server-renderer/server-plugin')module.exports = merge(baseConfig, {  entry: './js/test/entry-server.js',  target: 'node',  devtool: 'source-map',  output: {    libraryTarget: 'commonjs2'  },  externals: nodeExternals({    whitelist: /\.css$/  }),  plugins: [    new VueSSRServerPlugin()  ]})我的运行步骤是，先 webpack --config webpack.ssr.js，会成功打包出vue-ssr-server-bundle.json文件,之后node server.js，但是渲染失败，页面是空白的。

Answer 1

解决了，./dist/vue-ssr-server-bundle.json不能是相对路径，必须绝对路径