What it does
Lifecycle hook that is called when any data-bound property of a directive changes.
How to use
.
Interface Overview
Interface Description
ngOnChanges
is called right after the data-bound properties have been checked and before view
and content children are checked if at least one of them has changed.
The changes
parameter contains the changed properties.
exported from core/index, defined in core/src/metadata/lifecycle_hooks.ts