Day 1: Error: “Module not found: Error: Can’t resolve ‘@angular/core'”

Scenario:

This error often occurs when you try to run your Angular application after installing or upgrading Angular packages and it can’t find the @angular/core module.

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Solution:

1.Ensure Dependencies are Installed Correctly:
Make sure all dependencies are properly installed by running:

 npm install

2.Check package.json:
Ensure that @angular/core and other Angular dependencies are listed in your package.json. It should look something like this:

 "dependencies": { "@angular/core": "^12.0.0", "@angular/common": "^12.0.0", ... }

3.Clean npm Cache and Reinstall Node Modules:
Sometimes, npm cache can cause issues. Clear the cache and reinstall the node modules:

 npm cache clean --force rm -rf node_modules npm install

4.Check the tsconfig.json Configuration:
Ensure the paths in tsconfig.json are correctly configured:

 { "compilerOptions": { "baseUrl": "./", "paths": { "@angular/*": ["node_modules/@angular/*"] } } }

5.Update Angular CLI:
Ensure your Angular CLI is up-to-date:

 npm install -g @angular/cli

6.Restart the Development Server:
Sometimes, simply restarting the development server can solve the issue:

 ng serve

If you’ve followed all these steps and the problem persists, you may want to check for any specific issues related to your project setup or Angular version.

Feel free to ask for another error and its solution tomorrow!

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Happy coding! 🚀