BREAKING CHANGES:
- Overlay components, such as Alert or Modals, should now be created
using its injected provider.
- Overlays now have the `present()` method on the overlay’s instance,
rather than using `nav.present(overlayInstance)`.
- All overlays now present on top of all app content, to include menus.
- Below is an example of the change to `Alert`, but the pattern is the
same for all overlays: ActionSheet, Loading, Modal, Picker, Popover,
Toast
WAS:
```
import { NavController, Alert } from ‘ionic-angular’;
constructor(private nav: NavController) {
}
doAlert() {
let alert = Alert.create({
title: 'Alert',
});
this.nav.present(alert);
}
```
NOW:
```
import { AlertController } from ‘ionic-angular’;
constructor(private alertCtrl: AlertController) {
}
doAlert() {
let alert = this.alertCtrl.create({
title: 'Alert'
});
alert.present();
}
```
Toolbars can be stacked up vertically in `<ion-header>`,
`<ion-content>`, and `<ion-footer>` elements. However, toolbars also
come with borders on both the top and bottom of the toolbar. To give
developers full control of the design, Ionic also includes the
`no-border-bottom` and `no-border-top` attributes. For example,
sometimes two vertically stacked toolbars may have different background
colors, in this case it might be best to leave a border between them.
However, if they have the same background color, the app may look best
without a border between them. The main point here is, it's entirely up
to the app's design to decide when and when not to show borders between
toolbars, and to do so then each toolbar can individually set
`no-border-bottom` and `no-border-top` attributes.
