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Angular Error NG8001: is not a known element Angular component, then verify part of this module - YouTube
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angular - mat-expansion-panel, content doesnt recover his original height after closing a panel - Stack Overflow
mat-expansion-panel - styles get messed up if panel is a child of another element · Issue #13419 · angular/components · GitHub
Tepmlate Parse Error: 'mat-accordian' is not a known element · Issue #8917 · angular/components · GitHub
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Beginner: How/ where to import expansion? error: 'mat-panel-description' is not a known element: : r/angular
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