Angular Universal-用模拟模块替换实际模块

Question

默认情况下，Angular Universal不附带webpack。但是，我想知道是否有一种方法可以延迟加载模块，或加载模拟版本以停止编译错误。使用webpack，我们可以执行以下操作：

const NormalModuleReplacementPlugin = require('webpack/lib/NormalModuleReplacementPlugin');


module.exports = {
    ...
    plugins: [
        new NormalModuleReplacementPlugin(
            /module/,
           root('./client/app/shared/servermocks/my-module.mock.ts')
          )
    ]
};

我不知道如何在不破坏我的代码的情况下安装webpack（我认为它是有原因删除的）。但是，有没有使用默认的角度服务器文件执行此操作的更简单方法？

import 'zone.js/dist/zone-node';

import { ngExpressEngine } from '@nguniversal/express-engine';
import * as express from 'express';
import { join } from 'path';

import { AppServerModule } from './src/main.server';
import { APP_BASE_HREF } from '@angular/common';
import { existsSync } from 'fs';

// The Express app is exported so that it can be used by serverless Functions.
export function app() {
  const server = express();
  const distFolder = join(process.cwd(), 'dist/myModule/browser');
  const indexHtml = existsSync(join(distFolder, 'index.original.html')) ? 'index.original.html' : 'index';

  // Our Universal express-engine 
  // (found @ https://github.com/angular/universal/tree/master/modules/express-engine)
  server.engine('html', ngExpressEngine({
    bootstrap: AppServerModule,
  }) as any);

  server.set('view engine', 'html');
  server.set('views', distFolder);

  // Example Express Rest API endpoints
  // server.get('/api/**', (req, res) => { });
  // Serve static files from /browser
  server.get('*.*', express.static(distFolder, {
    maxAge: '1y'
  }));

  // All regular routes use the Universal engine
  server.get('*', (req, res) => {
    res.render(indexHtml, { req, providers: [{ provide: APP_BASE_HREF, useValue: req.baseUrl }] });
  });

  return server;
}

function run() {
  const port = process.env.PORT || 4000;

  // Start up the Node server
  const server = app();
  server.listen(port, () => {
    console.log(`Node Express server listening on http://localhost:${port}`);
  });
}

// Webpack will replace 'require' with '__webpack_require__'
// '__non_webpack_require__' is a proxy to Node 'require'
// The below code is to ensure that the server is run only when not requiring the bundle.
declare const __non_webpack_require__: NodeRequire;
const mainModule = __non_webpack_require__.main;
const moduleFilename = mainModule && mainModule.filename || '';
if (moduleFilename === __filename || moduleFilename.includes('iisnode')) {
  run();
}

export * from './src/main.server';

谢谢！

Answer 1

我知道了。在tsconfig.server.json中，我可以编辑两个选项：

    "paths": {
      "quill": ["src/app/quill.mock.server.ts"]
    }

而且您还必须像这样添加文件：

  "files": [
    "src/main.server.ts",
    "server.ts",
    "src/app/quill.mock.server.ts",
  ],