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webpack4 配置 ssr 环境遇到“document is not defined”

最近使用 webpack 4 配置 ssr 环境,发现的问题:

ReferenceError: document is not defined

本次package.json使用版本信息:

{
  "vue-loader": "^15.4.2",
  "mini-css-extract-plugin": "^0.4.3",
  "webpack": "^4.20.2",
  "webpack-cli": "^3.1.2"
  ...
}

相关代码

问题原因:

在服务端渲染打包的配置中使用了mini-css-extract-plugin是的server bundle中会使用到document,node环境中不存在window对象,所以报错。

解决办法:

在webpack.base.config.js中不配置样式相关的loader:

# 基本配置
const path = require('path')
const webpack = require('webpack')
const {VueLoaderPlugin} = require('vue-loader')
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')

const resolve = dir => path.join(__dirname, '../', dir)
const isProd = process.env.NODE_ENV === 'production'

const base = {
 mode: isProd "src")
   },
   {
    test: /\.js$/,
    loader: 'babel-loader',
    exclude: file => (
     /node_modules/.test(file) && !/\.vue\.js/.test(file)
    )
   },
   {
    test: /\.(png|jpg|gif|svg)$/,
    loader: 'url-loader',
    options: {
     limit: 10000,
     name: '[name].[ext]"htmlcode">
# 只展示先关配置
const webpack = require('webpack')
const merge = require('webpack-merge')
const base = require('./webpack.base.config')
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const VueSSRClientPlugin = require('vue-server-renderer/client-plugin')

const isProd = process.env.NODE_ENV === 'production'

const config = merge(base, {
 module: {
  rules: [
   {
    test: /\.styl(us)"htmlcode">
# 只展示先关配置
const webpack = require('webpack')
const merge = require('webpack-merge')
const base = require('./webpack.base.config')
const VueSSRServerPlugin = require('vue-server-renderer/server-plugin')

module.exports = merge(base, {
 target: 'node',
 module: {
  rules: [
   {
    test: /\.styl(us)"color: #ff0000">参考Demo:

tiodot/vnews

相关issues:

vue-loader@15.0.0-rc.1 in a server bundle

webpack-contrib/mini-css-extract-plugin

结语:

由于本次webpack4版本比较新,周边的插件没能及时做出相应更新;

相信经过社区的不断努力,整个生态会更加健壮。

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。