ionic screen hooks code example

Example 1: ionic lifecycle

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()