Transitioning AngularJS to utilize imports and exports

We are in the process of transitioning our project from AngularJS (v1.6) + TypeScript to the latest version of Angular. To prepare for this upgrade, we want to start implementing components similar to how they are written in Angular. Currently, we are not using imports or exports, but we would like to gradually introduce them. For example:

import * as angular from "angular";
    import { MyComponentComponent } from './MyComponent.component';

    export default angular
      .module('myModule', [])
      .component('myComponent', MyComponent);
    

instead of

angular
      .module('myModule', [])
      .component('myComponent', MyComponent);
    

However, when we try to do this, it causes issues with scope. Our app currently relies on the global variable 'angular' for everything, while using import/export creates closures that inject a separate instance of 'angular', leading to communication problems between the two. Is there a way to combine these methods so that we can smoothly upgrade our existing system?

Answer №1

Explore the benefits of NgUpgrade to elevate your application to the most recent version.

For more information, visit https://angular.io/guide/upgrade

Answer №2

If you're looking to upgrade your Angular project, using ngUpgrade is a highly recommended approach. This method allows for a more efficient transition from AngularJS to Angular by enabling the conversion of code side by side while running both AngularJS and Angular simultaneously. To successfully migrate your project, follow these key steps:

  1. Install dependencies for Angular and ngUpgrade.
  2. Set up ngUpgrade for your project.

Currently, we are in the process of migrating our own AngularJS project to Angular. For a detailed overview of the migration process, we've found the following references helpful and hope they assist you as well:

Answer №3

There are a couple of approaches to consider:

  1. Revamping the entire application (the most effective method, but can be challenging for large applications)
  2. Transitioning to a hybrid state (such as upgrading without creating a fork by developing a transitional hybrid app with both AngularJS and Angular 5). Check out AngularJS to Angular5 — Upgrading a large application
  3. Migrating module by module. Refer to Migrating Angular 1 Applications to Latest Angular in 5 Simple Steps

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