Displaying an asycnhronous loader in angular

To display a loader while waiting for an AJAX call to be processed, use a template, and an *ngIf / else condition on a container.

Example, with ng zorro :

<ng-container *ngIf="!saving else loading">
Will be displayed once the "saving" variable is false.

<ng-template #loading>
  <div nz-row nzJustify="center">
    <nz-spin nzSimple></nz-spin> Displayed as long as the "saving" variable is true ...

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