Question

What does the first parameter of `ngOnChanges()` typically contain?

a) Input property names
b) Output property names
c) SimpleChanges
d) ViewContainerRef

Answer 1

The first parameter of ngOnChanges() typically contains SimpleChanges. ngOnChanges() is a lifecycle method in Angular that is called whenever there is a change in input properties in a component.

Step-by-step explanation:

The first parameter of ngOnChanges() typically contains SimpleChanges.

ngOnChanges() is a lifecycle method in Angular that is called whenever there is a change in input properties in a component. The SimpleChanges object contains metadata about each of the changed properties, including previous and current values. It allows the component to react to the changes and perform any necessary actions.