Doesn't see the matHeaderRowDef directive?

Question

Angular

There are two lines of code that I wrote according to the guide - https://material.angular.io/components/table/overview

<tr mat-header-row *matHeaderRowDef="displayedColumns;"></tr>
<tr mat-row *matRowDef="let row; columns : displayedColumns"></tr>

But the following warning pops up -


the array is declared, the modules are all added -

imports: [
    BrowserModule,
    MatTableModule,
    MatSortModule,
    MatPaginatorModule,
    BrowserAnimationsModule
  ],

What could be the reason for this warning?

Answer 1

Bug in all Jetbrains products, reinstall node_modules folder