【问题标题】:Angular Universal - Replace Real Module with Mock ModuleAngular Universal - 用模拟模块替换真实模块
【发布时间】:2020-04-20 06:09:26
【问题描述】:

Angular Universal 没有默认安装 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,我们可以这样做:

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(我认为它被删除是有原因的)。但是,有没有更简单的方法可以使用默认的 Angular 服务器文件来做到这一点?

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!

【问题讨论】:

  • 你不能只在app-server.module.ts中导入Mock模块吗?
  • 我可以,但它也会在被调用时导入常规模块。
  • 可能有一个app.moduleapp-browser.moduleapp-server.module 文件,比如这里:github.com/Angular-RU/angular-universal-starter/tree/master/src(未测试)
  • 那些文件已经存在并且是 Angular Universal 的一部分。
  • 你不能将真实模块添加到 app-bower.module 并将模拟模块添加到 app-server.module 吗?

标签: angular webpack angular-universal


【解决方案1】:

我想通了。在 tsconfig.server.json 我可以编辑两个选项:

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

你必须像这样添加文件:

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

【讨论】:

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