In case you are developing an AngularJS application with Kendo UI jQuery widgets, you could use the kendo.ui.progress
to indicate ongoing task (loading indicator) on the page.
In case you are developing an Angular 2+ application, the suite offers you a loader styling element:
Keep in mind, that the loading indicator on the documentation examples is a custom one. The available k-i-loading
loader could be seen in the following Plunker sample