angular-errors

Angular NG8001 & NG0304: 'X' Is Not a Known Element — Fix

Angular's NG8001 (build-time) and NG0304 (runtime) both mean the compiler can't resolve an element. Here's the exact cause and the real fix, standalone and NgModule.

Angular NG0100: Fix ExpressionChangedAfterItHasBeenCheckedError

NG0100 ExpressionChangedAfterItHasBeenCheckedError means a binding changed after Angular's dev-mode verification pass. Here's the exact cause, and the fix.

Angular NG0201: NullInjectorError No Provider for HttpClient — Fix

NullInjectorError: No provider for HttpClient! (NG0201) means Angular's injector can't find a registered provider. Here's the exact fix for standalone apps, NgModules, and tests.

Angular NG0203: Fix inject() Injection Context Errors

NG0203: inject() must be called from an injection context stops your app cold. Here's exactly why it happens and the three real fixes.