Deprecations
Deprecations
Listing which components or syntax doesn't work in ionic 4 but used to work in ionic 2/3 via following the ionic 2/3 tutorial from Udemy.
Syntax Changes
ion-toolbar vs ion-navbar
ion-navbar is deprecated & using it leads to blank screen, have to replace it with ion-toolbar.
<ion-navbar>
<ion-toolbar>
navPop navPush
Doesn't work with ion-button navPop & navPush in ionic 4.
<button ion-button NavPop>Go Back</button>
ionic v4 Life cycle
New life cycle changes are updated on their migration guide on ionic website here.
Older events like ionViewDidLoad, ionViewCanLeave, and ionViewCanEnter have been removed, and the proper Angular alternatives should be used.