This is an Angular Material component library for having a file input component.

npm i @ckeditor/ckeditor5-angular @ckeditor/ckeditor5-build-classic

npm i @weblauncher/material-ckeditor

Import module into your project app.module.ts or other sub-module:

import { MatCkeditorModule } from '@weblauncher/material-ckeditor';

In your templates now you can add

<mat-form-field>
  <mat-label>Editor</mat-label>
  <mat-ckeditor [(ngModel)]="content" 
                  placeholder="Select one file"></mat-ckeditor>
</mat-form-field>

Angular Material Administration library contribution guide