I'm trying to find the smoothest path to upgrading an angular application from v7 to v15. It's a big codebase with numerous deprecated packages and implementations. Is there a simpler approach to tackling this task? I appreciate any advice you can offer!
So far, I've used:
ng update @angular/cli
I also updated the core angular modules, but it's quite overwhelming. I'm wondering if there's a more straightforward solution out there.
A great strategy for tackling large updates is to break them down into smaller, more manageable steps.
Personally, I rely on the angular update guide to ensure I make all the necessary changes: https://update.angular.io/
Following this guide and updating one major version at a time can simplify the process for you.
After successfully migrating our Angular application (a relatively simple one) from version 11 to 12 and then from 12 to 13 without any major issues, we encountered some challenges when moving from 13 to 14. The main hurdle we faced was adapting to the new Cypress e2e test tool that had been introduced.
Currently, I am in the process of upgrading from version 14 to 15, which is proving to be a significant change due to the transition of most material components to a new "Standalone" architecture (although I'm not exactly sure what to call it). The initial part of the update went smoothly by following the instructions provided in the Update guide. However, I did run into some hiccups with ESLinter TypeScript issues, particularly related to implicit any definitions.
Although the Angular framework has been updated to version 15, we are still utilizing legacy code for the material components from version 14. In the Migration guide, there is guidance on updating these material components as well.
The final step of updating the material components proved to be challenging as it led to a breakdown of our entire application. Building became impossible, unit tests started failing, styling issues arose, and even the Cypress tests were unsuccessful. The root cause of these problems stemmed from missing module code imports and changes to @NgModule(), with Cypress indicating that input fields were no longer accessible...
In conclusion, I can attest that transitioning to version 15 has been quite demanding in my particular scenario.
To refresh your Angular application, consider starting with a clean installation and then carefully transferring over your existing modules to the new setup. Keep an eye on the packages during this process as they may require special attention.
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