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Development server

ng generate environments

• make sure that : import { environment } from './../environments/environment';

  environment{{env | json}}

• The build command uses environment.ts as the build target when no environment is specified

Configure target-specific file replacements

• angular.json

  "configurations": {
  "development": {
  "fileReplacements": [
      {
        "replace": "src/environments/environment.ts",
        "with": "src/environments/environment.development.ts"
      }
    ],
    …
  

• This means that when you build your development configuration with ng build --configuration development, the src/environments/environment.ts file is replaced with the target-specific version of the file, src/environments/environment.development.ts.

• we learn :

  • ng build --configuration=production

  • ng build --configuration=development

  • ng serve --configuration=production

  • ng serve --configuration=development