What it does
Lifecycle hook that is called when Angular dirty checks a directive.
How to use
.
Interface Overview
Interface Description
ngDoCheck
gets called to check the changes in the directives in addition to the default
algorithm. The default change detection algorithm looks for differences by comparing
bound-property values by reference across change detection runs.
Note that a directive typically should not use both DoCheck
and OnChanges
to respond to
changes on the same input, as ngOnChanges
will continue to be called when the default change
detector detects changes.
See KeyValueDiffers
and IterableDiffers
for implementing custom dirty checking
for collections.
exported from core/index, defined in core/src/metadata/lifecycle_hooks.ts