angular/projects/ng-devtools/src/lib/devtools.component.html

<ng-container *ngIf="angularExists === true; else errorOrLoad">
  <ng-container *ngIf="supportedVersion; else notSupported">
    <div class="devtools-wrapper noselect" [@enterAnimation]>
      <ng-devtools-tabs [messageBus]="messageBus" [angularVersion]="angularVersion"></ng-devtools-tabs>
    </div>
  </ng-container>
  <ng-template #notSupported>
    <ng-container *ngIf="prodMode; else versionTooLow">
      <p class="text-message">
        Angular Devtools only supports dev mode.
      </p>
    </ng-container>
    <ng-template #versionTooLow>
      <p class="text-message">
        Angular Devtools only supports Angular versions 9 and above.
      </p>
    </ng-template>
  </ng-template>
</ng-container>
<ng-template #errorOrLoad>
  <ng-container *ngIf="angularExists === false; else load">
    <p class="text-message">
      Not an Angular app
    </p>
  </ng-container>
  <ng-template #load>
    <div class="initializing" *ngIf="angularExists === null">
      <div class="loading"></div>
    </div>
  </ng-template>
</ng-template>