Ionic 5 Modal over modal is missing ion-backdrop

Question

Why is my ion-backdrop + modal shadow styling not working when I open a modal on top of another modal?

PREFACE: This was working fine with V4, but broken on the upgrade to V5. I don’t want to change my page approach, just fix the CSS/whatever is actually causing the issue below.

• My app opens a modal page with custom css to make it full screen.

  I can then open another normal modal (but not full screen) over the top. This 2nd modal is missing the ion-backdrop and its border shadow styling.

  I can see the ion-backdrop is definitely in the DOM, but it’s obviously not showing.

Step1 Fine enter image description here

Step 2 - broken ion-backdrop: enter image description here

Showing my custom modal:

async showClipboard() {
    const modal = await this._ModalController.create({
      component: ClipboardPage,
      cssClass: 'custom-round-modal',
      componentProps: {
        user: this.user
      },
      showBackdrop: true
    });
    await modal.present(); 
  }

The CSS:

@media only screen and (min-width: 768px) {
  .custom-round-modal {
    .modal-wrapper {
      border-radius: 15px !important;
      -moz-border-radius: 15px !important;
      -webkit-border-radius: 15px !important;
      .ion-page {
        border-radius: 15px !important;
        -moz-border-radius: 15px !important;
        -webkit-border-radius: 15px !important;
      }
    }
  }
}

Answer 1

First off, I think you pasted the same screenshot twice by mistake. But I'm having the same issue, so I know what you mean.

It looks like Ionic 5 introduced this css for the modals:

.sc-ion-modal-ios-h:first-of-type {
    --backdrop-opacity: var(--ion-backdrop-opacity, 0.4);
}

Which means when you show multiple modals at the same time, only the first one will get the backdrop.

A possible workaround is to add the backdrop yourself to your global css using something like this:

ion-modal {
    --backdrop-opacity: var(--ion-backdrop-opacity, 0.4);
}

Or use the css class Ionic is using (but note that this one is iOS specific, so you'd likely need to do the same with the Android-equivalent class):

.sc-ion-modal-ios-h {
    --backdrop-opacity: var(--ion-backdrop-opacity, 0.4);
}

NOTE: This will likely not look good if you are showing multiple modals on top of each other that are not fullscreen, since you'll be getting multiple backdrops on top of each other (so they'll get increasingly darker). But since your issue is a non-fullscreen modal on top of a fullscreen one, I think it will work in your case.

Hopefully the Ionic team will come up with a more elegant solution to this issue.

Answer 2

This is addressed now in the Ionic Documentation. Please see under 'Customization' section for ion-modal : https://ionicframework.com/docs/api/modal

Add the following CSS to your modal class -

ion-modal.stack-modal {
  --box-shadow: 0 28px 48px rgba(0, 0, 0, 0.4);
  --backdrop-opacity: var(--ion-backdrop-opacity, 0.32);
}