ionic 4 ionViewWillEnter code example

Example 1: ionviewwillenter

ionViewWillEnter	Fired when the component routing to is about to animate into view.
ionViewDidEnter	Fired when the component routing to has finished animating.
ionViewWillLeave	Fired when the component routing from is about to animate.
ionViewDidLeave	Fired when the component routing to has finished animating.

Example 2: ionviewwillenter in ionic 5

ngAfterViewInit()