renderModule不是一个函数:angular12 @nguniversal只在preender上

Question

正在迁移一个静态angular 8网站,prerenderingPages本地失败

第一步是使用ng add @nguniversal/express-engine生成最新的脚手架，然后清理之前的angular8/通用代码。

✅我可以成功运行dev:ssr、build:ssr和serve:ssr。

"dev:ssr": "ng run website:serve-ssr",
"build:ssr": "ng build && ng run website:server",
"serve:ssr": "node dist/server/main.js",

❌当运行npm run prerender时，我有以下错误

> ng run website_en:prerender
✔ Browser application bundle generation complete.
✔ Copying assets complete.
✔ Index html generation complete.
Build at: 2021-08-02T13:56:58.216Z - Hash: b2a4bcc276d1ce7a8de9 - Time: 26662ms
✔ Server application bundle generation complete.
Build at: 2021-08-02T13:57:00.109Z - Hash: 0f46572a7951c62abea9 - Time: 31768ms
✖ Prerendering routes to ~/website/dist/en failed.
renderModule is not a function

我怀疑与angular8之前的代码有一些冲突，但在线查看大多数代码样本看起来与我的项目相似。而且项目是非常简约的，没有太多的依赖关系来冲突或挣扎。

全部日志

$ npm run prerender
> website@0.0.0 prerender ~/website
> ng run website_en:prerender
Warning: Support was requested for IE 11 in the project's browserslist configuration. IE 11 support is deprecated since Angular v12.
For more information, see https://angular.io/guide/browser-support
✔ Browser application bundle generation complete.
✔ Copying assets complete.
✔ Index html generation complete.
Initial Chunk Files                   | Names         |      Size
main.2703b1ee464983914c90.js          | main          | 549.78 kB
polyfills-es5.2669892dbe0306fd6806.js | polyfills-es5 | 196.24 kB
polyfills.09b63a2959800df8a004.js     | polyfills     | 103.74 kB
styles.ee78a15edec5586952fa.css       | styles        |  51.58 kB
runtime.0ad0b9f7bc4456da9d9e.js       | runtime       |   3.41 kB
| Initial Total | 904.75 kB
Lazy Chunk Files                      | Names         |      Size
459.ca33d2d2dfd51ae7e99b.js           | -             |  12.67 kB
341.48060e5c202342d1cc32.js           | -             |  12.41 kB
34.4553ce01726f9dd74f9c.js            | -             |   9.67 kB
846.d0bde86d8ef5c235cb29.js           | -             |   6.73 kB
284.f7119b6b03003373bf17.js           | -             |   5.25 kB
common.a1228fa90f251ccea342.js        | common        | 922 bytes
Build at: 2021-08-02T13:56:58.216Z - Hash: b2a4bcc276d1ce7a8de9 - Time: 26662ms
✔ Server application bundle generation complete.
Initial Chunk Files | Names         |    Size
main.js             | main          | 4.50 MB
| Initial Total | 4.50 MB
Build at: 2021-08-02T13:57:00.109Z - Hash: 0f46572a7951c62abea9 - Time: 31768ms
✖ Prerendering routes to ~/website/dist/en failed.
renderModule is not a function

angular.json

我相信我的angular.json是正确配置的

{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"website_en": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/en",
"index": "src/index.html",
"main": "src/main.ts",
"tsConfig": "src/tsconfig.app.json",
"polyfills": "src/polyfills.ts",
"assets": [
"src/assets"
],
"styles": [
"src/styles.scss"
],
"scripts": []
},
"configurations": {
"development": {},
"production": {
"outputHashing": "all",
"sourceMap": false,
"namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true,
"optimization": {
"scripts": true,
"styles": {
"minify": true,
"inlineCritical": false
},
"fonts": true
},
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
]
}
}
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "website_en:build"
},
"configurations": {
"production": {
"browserTarget": "website_en:build:production"
},
"development": {
"browserTarget": "website_en:build:development"
}
}
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "website_en:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"karmaConfig": "./karma.conf.js",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
"scripts": [],
"styles": [
"src/styles.scss"
],
"assets": [
"src/assets"
]
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"src/tsconfig.app.json",
"src/tsconfig.spec.json"
],
"exclude": [
"**/node_modules/**"
]
}
},
"server": {
"builder": "@angular-devkit/build-angular:server",
"options": {
"outputPath": "dist/server",
"main": "server.ts",
"tsConfig": "src/tsconfig.server.json"
},
"configurations": {
"production": {},
"development": {}
}
},
"serve-ssr": {
"builder": "@nguniversal/builders:ssr-dev-server",
"configurations": {
"development": {
"browserTarget": "website_en:build:development",
"serverTarget": "website_en:server:development"
},
"production": {
"browserTarget": "website_en:build:production",
"serverTarget": "website_en:server:production"
}
},
"defaultConfiguration": "development"
},
"prerender": {
"builder": "@nguniversal/builders:prerender",
"options": {
"browserTarget": "website_en:build:production",
"serverTarget": "website_en:server:production",
"routesFile": "./static.paths.txt"
},
"configurations": {
"production": {}
},
"defaultConfiguration": "production"
}
}
}
},
"defaultProject": "website_en",
"cli": {
"warnings": {
"typescriptMismatch": false
}
},
"schematics": {
"@schematics/angular:component": {
"prefix": "app",
"styleext": "css"
},
"@schematics/angular:directive": {
"prefix": "app"
}
}
}

static.paths.txt

我的文件static.paths.txt似乎可以正确加载，因为npm在触发错误之前简要报告生成了4个url

/contact
/resources
/legal

tsconfig.json

我猜从tsconfig.json中没有太多的期望

{
"compileOnSave": false,
"compilerOptions": {
"importHelpers": true,
"outDir": "./dist/out-tsc",
"sourceMap": true,
"declaration": false,
"module": "esnext",
"moduleResolution": "node",
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"resolveJsonModule": true,
"esModuleInterop": true,
"target": "es5",
"typeRoots": [
"node_modules/@types"
],
"lib": [
"es2017",
"dom"
],
"baseUrl": "./"
},
"include": [
"server.ts"
]
}

tsconfig.app.json

{
"extends": "../tsconfig.json",
"compilerOptions": {
"outDir": "../out-tsc/app",
"baseUrl": "./",
"types": []
},
"include": [
"**/*.ts"
],
"exclude": [
"test.ts",
"**/*.spec.ts",
"main.server.ts",
"app/app.server.ts"
]
}

tsconfig.server.json

{
"extends": "../tsconfig.json",
"compilerOptions": {
"outDir": "../out-tsc/app",
"baseUrl": "./",
// Set the module format to "commonjs":
"module": "commonjs",
"types": []
},
"exclude": [
"test.ts",
"**/*.spec.ts"
],
// Add "angularCompilerOptions" with the AppServerModule you wrote
// set as the "entryModule".
"angularCompilerOptions": {
"entryModule": "app/app.server#AppServerModule"
}
}

server.ts

我唯一的问题是关于生成的服务器。进口快递时使用。我的tsconfig在抱怨，我可以很容易地修复，但使用import express from "express";。同样，动态的ssr也能正常工作。

Error: server.ts:13:18 - error TS2349: This expression is not callable.
Type 'typeof e' has no call signatures.
13   const server = express();
~~~~~~~
server.ts:4:1
4 import * as express from "express";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Type originates at this import. A namespace-style import cannot be called or constructed, and will cause a failure at runtime. Consider using a default import or import require here instead.

"dependencies": {
"@angular/animations": "^12.1.4",
"@angular/common": "^12.1.4",
"@angular/compiler": "^12.1.4",
"@angular/core": "^12.1.4",
"@angular/forms": "^12.1.4",
"@angular/http": "^7.2.16",
"@angular/platform-browser": "^12.1.4",
"@angular/platform-browser-dynamic": "^12.1.4",
"@angular/platform-server": "^12.1.4",
"@angular/router": "^12.1.4",
"@nguniversal/express-engine": "^12.1.0",
"@ngx-translate/core": "^13.0.0",
"@ngx-translate/http-loader": "^6.0.0",
"@sentry/browser": "^6.10.0",
"aos": "^2.3.4",
"core-js": "^3.16.0",
"country-flag-emoji": "^1.0.3",
"express": "^4.15.2",
"express-sslify": "^1.2.0",
"geo-tz": "^6.0.1",
"mapbox-gl": "^2.4.0",
"rxjs": "^7.3.0",
"tslib": "^2.3.0",
"web-animations-js": "^2.3.2",
"zone.js": "^0.11.4"
}

Answer 1

为了解决这样的问题，我首先睡在它😆上，然后使用angular-ci生成一个全新的angular项目，然后添加@nguniversal/express-engine，看看我是否有任何主要差异。

npm install -g @angular/cli
ng add @nguniversal/express-engine
npm run prerender

发现我的main.server.ts文件没有正确初始化。现在可以正常工作了

✅正确的main.server.ts版本

/***************************************************************************************************
* Initialize the server environment - for example, adding DOM built-in types to the global scope.
*
* NOTE:
* This import must come before any imports (direct or transitive) that rely on DOM built-ins being
* available, such as `@angular/elements`.
*/
import '@angular/platform-server/init';
import { enableProdMode } from '@angular/core';
import { environment } from './environments/environment';
if (environment.production) {
enableProdMode();
}
export { AppServerModule } from './app/app.server';
export { renderModule, renderModuleFactory } from '@angular/platform-server';

❌main.server.ts的旧版本

import { environment } from './environments/environment';
import { enableProdMode } from '@angular/core';
enableProdMode();
export {AppServerModule} from './app/app.server';