Readonly CSS Styling: MatFormField should reflect css class 'mat-form-field- readonly' similar to 'mat-form-field-disabled' · Issue #15809 · angular/components · GitHub
matPrefix element not aligned properly in form field with appearance fill and outline · Issue #12803 · angular/components · GitHub
![javascript - Updating <mat-icon> from one <mat-form-field> to another doesn't consistently update the icon - Stack Overflow javascript - Updating <mat-icon> from one <mat-form-field> to another doesn't consistently update the icon - Stack Overflow](https://i.stack.imgur.com/OnAop.gif)