How can I set up unique values for a variable or constant in Angular 2 based on different environments?

Currently, I am working on a project that combines Angular 2/Ionic 2 with JEE 7. In this particular scenario:

I have created an httpClient layer to handle all backend calls, and within this layer, there is a const variable called REST_BASE_PATH. During development, I want this variable to point to my localhost, but in production, it should point to a specific address.

Considering this, I am seeking the most efficient and automated approach to achieve this functionality. Any suggestions would be greatly appreciated.

dependency-injectiontypescriptionic-frameworkangular

Answer №1

If you want to streamline this process and make it more organized, consider creating custom request options:

export class AppRequestOptions extends BaseRequestOptions {
  constructor(private @Inject('webApiBaseUrl') webApiBaseUrl:string) {
  }

  merge(options?:RequestOptionsArgs):RequestOptions {
    options.url = this.webApiBaseUrl + options.url;
    return super.merge(options);
  }
}

The injected value for webApiBaseUrl can be specified during the initialization of your application:

bootstrap(AppComponent, [
  HTTP_PROVIDERS,
  provide('webApiBaseUrl', { useValue: 'https://bookapi.apispark.net/v1' })
]);
  • Learn how to set base url for angular 2 http requests

Remember to adjust the variable when packaging your application with values suitable for the production environment.

If you're unsure about the packaging process, check out this helpful question:

  • How do I actually deploy an Angular 2 + Typescript + systemjs app?

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