我正在尝试创建 Vue.js 3 SSR 应用程序（包括 ts、@vue/cli、babel）。我使用 nodejs + express 作为后端。SSR 工作正常（我正在从服务器正确呈现 html），但在客户端水合期间发生错误。似乎我的客户端构建不包含组件的模板，因为我在浏览器中遇到了这些错误
Vue warn]: Component is missing template or render function.
at <App>
at <App>
Vue warn]: Hydration node mismatch:
- Client vnode: Symbol(Comment)
- Server rendered DOM: <div class="hello-world">hello</div>
at <App>
at <App>
runtime-core.cjs.js:2942 Hydration completed but contains mismatches.
我发现当我用渲染函数替换模板时错误消失了，但它再次出现在子组件中（为简单起见，HelloWorld 没有子组件）。
这是我的 github 存储库，我在其中重现了我的问题。
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
</head>
<body>
<div id="app">SSR_APP_CONTENT</div>
</body>
</html>
package.json
{
"name": "ssr3",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "rimraf dist && yarn build:server && yarn build:client",
"build:server": "cross-env SSR=true vue-cli-service build --dest dist/server --mode development",
"build:client": "vue-cli-service build --dest dist/client --mode development",
"lint": "vue-cli-service lint"
},
"dependencies": {
"core-js": "^3.6.5",
"vue": "^3.0.0",
"vue-router": "^4.0.0-0",
"@vue/server-renderer": "^3.0.0",
"class-transformer": "^0.3.1",
"express": "^4.17.1",
"reflect-metadata": "^0.1.13",
"webpack-manifest-plugin": "^2.2.0",
"webpack-node-externals": "^2.5.2"
},
"devDependencies": {
"@typescript-eslint/eslint-plugin": "^2.33.0",
"@typescript-eslint/parser": "^2.33.0",
"@vue/cli-plugin-babel": "~4.5.0",
"@vue/cli-plugin-eslint": "~4.5.0",
"@vue/cli-plugin-router": "~4.5.0",
"@vue/cli-plugin-typescript": "~4.5.0",
"@vue/cli-service": "~4.5.0",
"@vue/compiler-sfc": "^3.0.0",
"@vue/eslint-config-prettier": "^6.0.0",
"@vue/eslint-config-typescript": "^5.0.2",
"eslint": "^6.7.2",
"eslint-plugin-prettier": "^3.1.3",
"eslint-plugin-vue": "^7.0.0-0",
"node-sass": "^4.12.0",
"prettier": "^1.19.1",
"sass-loader": "^8.0.2",
"typescript": "~3.9.3",
"cross-env": "^7.0.2",
"husky": "^4.2.5",
"lint-staged": "^10.2.11"
},
"eslintConfig": {
"root": true,
"env": {
"node": true
},
"extends": [
"plugin:vue/vue3-essential",
"eslint:recommended",
"@vue/typescript/recommended",
"@vue/prettier",
"@vue/prettier/@typescript-eslint"
],
"parserOptions": {
"ecmaVersion": 2020
},
"rules": {}
},
"prettier": {
"semi": false,
"singleQuote": true,
"tabWidth": 4,
"arrowParens": "avoid",
"printWidth": 100
},
"browserslist": [
"> 1%",
"last 2 versions",
"not dead"
]
}
vue.config.js
const ManifestPlugin = require('webpack-manifest-plugin')
const nodeExternals = require('webpack-node-externals')
const webpack = require('webpack')
module.exports = {
configureWebpack: {
resolve: { mainFields: ['main', 'module'] }
},
chainWebpack: webpackConfig => {
const isSSR = process.env.SSR
webpackConfig
.entry('app')
.clear()
.add(isSSR ? './src/entry-server.ts' : './src/entry-client.ts')
webpackConfig.plugin('manifest').use(new ManifestPlugin({ fileName: 'manifest.json' }))
if (!isSSR) {
return
}
webpackConfig.target('node')
webpackConfig.output.libraryTarget('commonjs2')
webpackConfig.externals(nodeExternals({ allowlist: /\.(css|vue)$/ }))
webpackConfig.optimization.splitChunks(false).minimize(false)
webpackConfig.plugins.delete('hmr')
webpackConfig.plugins.delete('preload')
webpackConfig.plugins.delete('prefetch')
webpackConfig.plugins.delete('progress')
webpackConfig.plugin('limit').use(
new webpack.optimize.LimitChunkCountPlugin({
maxChunks: 1
})
)
}
}
App.vue
<template>
<HelloWorld />
</template>
<script lang="ts">
import { defineComponent } from 'vue'
import HelloWorld from '@/components/HelloWorld.vue'
export default defineComponent({
components: { HelloWorld }
})
</script>
HelloWorld.vue
<template>
<div class="hello-world">hello</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue'
export default defineComponent({})
</script>
app.ts
import { createSSRApp, h } from 'vue'
import App from '@/App.vue'
export const createApp = () => {
const rootComponent = {
render: () => h(App),
components: { App }
}
const app = createSSRApp(rootComponent)
return { app }
}
entry-server.ts
import { createApp } from '@/app'
export default async () => {
const { app } = createApp()
return app
}
entry-client.ts
import { createApp } from '@/app.ts'
const { app } = createApp()
app.mount('#app', true)
server.js
const path = require('path')
const fs = require('fs')
const express = require('express')
const { renderToString } = require('@vue/server-renderer')
const serverManifest = require('./dist/server/manifest.json')
const server = express()
const appPath = path.join(__dirname, '/dist/server', serverManifest['app.js'])
const createApp = require(appPath).default
server.use('/img', express.static(path.join(__dirname, '/dist/client', 'img')))
server.use('/js', express.static(path.join(__dirname, '/dist/client', 'js')))
server.use('/css', express.static(path.join(__dirname, '/dist/client', 'css')))
server.get(['/*'], async (req, res) => {
const app = await createApp()
const appContent = await renderToString(app)
fs.readFile(path.join(__dirname, '/dist/client/index.html'), (err, html) => {
if (err) {
throw err
}
html = html.toString().replace('SSR_APP_CONTENT', `${appContent}`)
res.setHeader('Content-Type', 'text/html')
res.send(html)
})
})
server.listen(80)
我的设置
- macOS Catalina 10.15.5
- Nodejs v12.19.0
- Google Chrome v86.0.4240.111