AngularJS change detection
From Wiki @ Karl Jones dot com
In AngularJS, a change detection checks for changes in the data model so that it can re-render the DOM.
Changes are caused by events, XHR, and times.
Each component has its own change detector.
Use ChangeDetectionStrategy.OnPush along with immutable objects and/or observables.
To checka particular component, inject ChangeDetectorRef and call markForCheck.
