Backup and Version Control:
Before starting any migration, commit your current state in your version control system (e.g., Git). This way, you can revert back in case of issues.
It's also a good idea to backup your project.
Update Nx:
To ensure compatibility, you should update Nx before updating Angular. Use the following command:
nx migrate latest3. Run Nx Migrations:
After updating the Nx CLI, you can now run the migrations that Nx provides:
nx migrate --run-migrations4. Update Angular CLI & Core:
Use the Angular CLI's update command:
ng update @angular/cli @angular/core5. Update Other Angular Libraries:
Besides the core Angular libraries, make sure you update other related libraries like Angular Material:
ng update @angular/materialCheck Third-party Libraries:
Ensure that any third-party libraries you're using are compatible with Angular 15. You might need to visit the official repositories or documentation of these libraries to see if there are any breaking changes or steps required for Angular 15.
Review Breaking Changes:
Every major Angular version can introduce breaking changes. Review the official Angular Update Guide (https://update.angular.io/) by selecting your current version and the version you're updating to. This guide will provide you with information on any changes you need to make manually.
Test Your Application:
Run your application locally and navigate through it to see if you observe any issues.
Run your unit tests and end-to-end tests.
Fixing Deprecated APIs:
Angular tends to deprecate APIs in favor of newer ones. Use tools like tslint (or eslint if you've switched) to identify deprecated APIs in your codebase and replace them with the suggested new methods.
Review Styles & Layout:
Sometimes, updates in Angular can affect the layout or styling, especially if you use Angular Material. Ensure that the application looks as expected.
Commit and Document:
Once everything is working as expected, commit the changes to your version control. Make sure you write meaningful commit messages detailing the migration.
Document any challenges or issues you faced during migration, and how you resolved them. This can be helpful for future reference or for other team members.
Stay Updated on Nx:
Nx is constantly evolving, and the Nx team might release patches or fixes related to migrations. Keep an eye on Nx's official documentation and update notes.
Remember, migrations can be tricky, especially when there are large gaps between versions. It's crucial to test every aspect of your application after the migration. If you encounter specific errors or issues, you can often find solutions or workarounds in the Angular or Nx communities, or you can ask here for more detailed assistance on specific problems.
