ENV vars with Angular & Nx

npm install --save-dev @types/node

# Or with yarn
yarn add --dev @types/node

{
  "build": {
    // NOTA: altere o executor para um que suporte configurações personalizadas do webpack.
    "executor": "@nrwl/angular:webpack-browser",
    // recorte
    "options": {
      // NOTE: This file needs to be created.
      "customWebpackConfig": {
        "path": "apps/myapp/webpack.config.js"
      }
      // recorte
    }
  },
  "serve": {
    // NOTA: altere o executor para um que suporte configurações personalizadas do webpack.
    "executor": "@nrwl/angular:webpack-server"
    // recorte
  }
}

// apps/myapp/webpack.config.js
const webpack = require('webpack');

function getClientEnvironment(configuration) {
  // Grab NODE_ENV and MY_APP_* environment variables and prepare them to be
  // injected into the application via DefinePlugin in webpack configuration.
  const MY_APP = /^MY_APP_/i;

  const raw = Object.keys(process.env)
    .filter((key) => MY_APP.test(key))
    .reduce(
      (env, key) => {
        env[key] = process.env[key];
        return env;
      },
      {
        NODE_ENV: process.env.NODE_ENV || configuration,
      }
    );

  // Stringify all values so we can feed into webpack DefinePlugin
  return {
    'process.env': Object.keys(raw).reduce((env, key) => {
      env[key] = JSON.stringify(raw[key]);
      return env;
    }, {}),
  };
}

module.exports = (config, options, context) => {
  config.plugins.push(
    new webpack.DefinePlugin(getClientEnvironment(context.configuration))
  );
  return config;
};

# apps/myapp/.env
MY_APP_API_URL=http://localhost:3333

// apps/myapp/src/main.ts
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';

if (process.env['NODE_ENV'] === 'production') {
  enableProdMode();
}

// This is defined in our .env file.
console.log('>>> MY_APP_API_URL', process.env['MY_APP_API_URL']);

platformBrowserDynamic()
  .bootstrapModule(AppModule)
  .catch((err) => console.error(err));

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    // recorte
    "types": ["node"]
  }
  // recorte
}