Compilation error occurred when running Angular with mat-form: ngcc encountered an issue while processing [email protected]

Currently dealing with a compile error in a small mat-form example that I created. Unfortunately, I am unable to pinpoint the exact issue causing this error. If you have a moment, please take a look at the code here:

https://stackblitz.com/edit/angular-ivy-2ummrb

The specific error message reads as follows:

Error in ~/src/main.ts
ngcc failed to run on <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="82f2e3f0f1e7b7c2b7acb3acb3">[email protected]</a>.

Answer №1

Here are the steps you need to follow:

  1. Start by updating Node to the most recent version available at this link.
  2. Make sure to set enableIvy: false in your tsconfig.json file.
  3. Delete both the node_modules folder and package-lock.json file.
  4. Next, run npm cache clean --force.
  5. After that, execute npm install.

I suggest utilizing ng update to pinpoint any outdated packages and update them all through commands like ng update @package, followed by running npm update.

Answer №2

After troubleshooting my StackBlitz project, I finally discovered the issue.

Step 1. In StackBlitz, it's not enough to just set up your project to enable or disable Ivy. You also need to make sure Ivy is enabled or disabled in the project settings on the left side (Settings). If you've done this, don't forget to reload the page.

Step 2. Sometimes, certain dependencies' versions may not be compatible with StackBlitz (possibly not supported by StackBlitz?). This can lead to errors indicating that a library is missing, even if you have included it like @angular/core in the packages.json. If you encounter such errors, try downgrading the version to see if an older one works.

I encountered these issues when working with Angular 13, but switching back to Angular 12 resolved all the problems.

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