Ionic Theme iOS27

A CSS/JS theme library that brings the iOS 27 Liquid Glass appearance and navigation animations to Ionic applications while preserving Ionic components and conventions.

Important

This main branch contains the iOS 27 theme under the package name @rdlabo/ionic-theme-ios27. For the iOS 26 theme (@rdlabo/ionic-theme-ios26), see the ios26 branch.

All versions before 1.0.0 are release candidates (RC). APIs, CSS variables, classes, styling, and behavior may change without backward compatibility, including in minor and patch releases. A stable compatibility commitment starts with 1.0.0.

Try the iOS 27 demo.

Installation

Requires @ionic/core 8.8.1 or later (Ionic 8 and 9). Install it in an existing Ionic project:

npm install @rdlabo/ionic-theme-ios27

And import the theme in your project's main CSS file (e.g., src/styles.scss).

@import '@rdlabo/ionic-theme-ios27/dist/css/default-variables.css';
@import '@rdlabo/ionic-theme-ios27/dist/css/ionic-theme-ios27.css';

/**
 * Keep Material Design mode unaffected by the iOS theme
 * when the same markup is used in both modes.
 * Note: This stylesheet is not included in `@rdlabo/ionic-theme-md3`.
 */
@import '@rdlabo/ionic-theme-ios27/dist/css/md-remove-ios-class-effect.css';

/**
 * If you will use the design of ion-item-group with ion-list on Android as well, import it.
 * More info: https://docs.rdlabo.dev/projects/ionic-theme-ios27/docs/using-ion-item-group
 * Note: This stylesheet is included in `@rdlabo/ionic-theme-md3`.
 * @import '@rdlabo/ionic-theme-ios27/dist/css/md-ion-list-inset.css';
 */

/*
 * Support Dark Mode
 * We support Ionic Dark Mode. More information is here: https://ionicframework.com/docs/theming/dark-mode
 * use Always:    @import '@rdlabo/ionic-theme-ios27/dist/css/ionic-theme-ios27-dark-always.css'
 * use System:    @import '@rdlabo/ionic-theme-ios27/dist/css/ionic-theme-ios27-dark-system.css'
 * use CSS Class: @import '@rdlabo/ionic-theme-ios27/dist/css/ionic-theme-ios27-dark-class.css'
 */

Configure animations

If you installed only the iOS 27 theme, configure its animations as follows.

import { isPlatform } from '@ionic/core'; // or @ionic/angular (Ionic 9), @ionic/angular/standalone (Ionic 8), @ionic/react, @ionic/vue
import { iosTransitionAnimation, popoverEnterAnimation, popoverLeaveAnimation } from '@rdlabo/ionic-theme-ios27';

// Angular
provideIonicAngular({
    ...
    navAnimation: isPlatform('ios') ? iosTransitionAnimation: undefined,
    popoverEnter: isPlatform('ios') ? popoverEnterAnimation: undefined,
    popoverLeave: isPlatform('ios') ? popoverLeaveAnimation: undefined,
});

// React
setupIonicReact({
    ...
    navAnimation: isPlatform('ios') ? iosTransitionAnimation: undefined,
    popoverEnter: isPlatform('ios') ? popoverEnterAnimation: undefined,
    popoverLeave: isPlatform('ios') ? popoverLeaveAnimation: undefined,
});

// Vue
createApp(App)
    .use(IonicVue, {
        ...
        navAnimation: isPlatform('ios') ? iosTransitionAnimation: undefined,
        popoverEnter: isPlatform('ios') ? popoverEnterAnimation: undefined,
        popoverLeave: isPlatform('ios') ? popoverLeaveAnimation: undefined,
})

Check the theme

Test on iOS. When previewing on desktop, set Ionic mode to ios in your existing framework initialization config (for example mode: 'ios').

Use this markup to preview the inset grouped list look. For the list structure the theme expects, see Using ion-item-group.

<ion-list mode="ios" inset="true">
  <ion-item-group>
    <ion-item><ion-label>Notifications</ion-label></ion-item>
    <ion-item><ion-label>Appearance</ion-label></ion-item>
  </ion-item-group>
</ion-list>

Optional: use the iOS 27 and MD3 themes together

Install the MD3 theme to style both Ionic modes from the same application.

The current releases of both themes require @ionic/core 8.8.1 or later.

npm install @rdlabo/ionic-theme-md3

When your global stylesheet uses Sass, initialize the themes in this order:

@use '@rdlabo/ionic-theme-ios27/src/styles/default-variables.scss' as ios27-vars;
@use '@rdlabo/ionic-theme-ios27/src/styles/ionic-theme-ios27.scss';
@use '@rdlabo/ionic-theme-ios27/src/styles/ionic-theme-ios27-dark-class.scss';
@use '@rdlabo/ionic-theme-ios27/src/styles/md-remove-ios-class-effect.scss';
@use '@rdlabo/ionic-theme-md3/dist/css/default-variables.css' as md3-vars;
@use '@rdlabo/ionic-theme-md3/dist/css/ionic-theme-md3.css';

The example uses Ionic's class-based dark mode. Your global stylesheet must also load Ionic's matching dark palette, such as @ionic/angular/css/palettes/dark.class.css for Angular. When using dark-system or dark-always, select the same variant for both Ionic's palette and the iOS 27 theme. See Ionic's Dark Mode documentation. The explicit ios27-vars and md3-vars namespaces prevent the two variable modules from using the same default namespace.

Configure both transition implementations when both themes are installed:

import { isPlatform } from '@ionic/core'; // or @ionic/angular (Ionic 9), @ionic/angular/standalone (Ionic 8), @ionic/react, @ionic/vue
import { iosTransitionAnimation, popoverEnterAnimation, popoverLeaveAnimation } from '@rdlabo/ionic-theme-ios27';
import { mdTransitionAnimation } from '@rdlabo/ionic-theme-md3';

// Angular
provideIonicAngular({
    ...
    navAnimation: isPlatform('ios') ? iosTransitionAnimation : mdTransitionAnimation,
    popoverEnter: isPlatform('ios') ? popoverEnterAnimation : undefined,
    popoverLeave: isPlatform('ios') ? popoverLeaveAnimation : undefined,
});

// React
setupIonicReact({
    ...
    navAnimation: isPlatform('ios') ? iosTransitionAnimation : mdTransitionAnimation,
    popoverEnter: isPlatform('ios') ? popoverEnterAnimation : undefined,
    popoverLeave: isPlatform('ios') ? popoverLeaveAnimation : undefined,
});

// Vue
createApp(App)
    .use(IonicVue, {
        ...
        navAnimation: isPlatform('ios') ? iosTransitionAnimation : mdTransitionAnimation,
        popoverEnter: isPlatform('ios') ? popoverEnterAnimation : undefined,
        popoverLeave: isPlatform('ios') ? popoverLeaveAnimation : undefined,
    });

Documentation

Full documentation: Ionic Theme iOS27

• Adaptive iOS themes — conditionally load iOS 26 or iOS 27 styles.
• Using ion-item-group — required markup for inset lists.
• Special markup and classes — opt-in markup and utility classes used by the theme.
• ESLint — check list structure with ESLint rules.
• Features — CSS variables, Liquid Glass, selective imports, and dark mode.
• Experimental Animation — tab bar and searchable effects.
• Migration — stylesheet, class, and CSS variable naming changes.
• iOS 26 migration history — earlier major-version changes for the previous package.

iOS 26 documentation: See the iOS 26 documentation for the previous theme.

Development & Testing

Demo Application

The same demo is deployed against both supported Ionic versions:

• Ionic 9 demo — canonical
• Ionic 8 demo — compatibility

The demo/ directory contains the Angular application used by both deployments. To run it locally:

cd demo
npm install
npm start

Visual Regression Testing

We use Playwright for visual regression testing to ensure consistent styling across all components. The test suite automatically captures screenshots of all routes in both light and dark modes.

Running Tests

cd demo

# Run all E2E tests
npm run test:e2e

# Run tests in UI mode (interactive)
npm run test:e2e:ui

# Debug tests
npm run test:e2e:debug

# Update baseline screenshots (when intentionally changing UI)
npm run test:e2e:update

Prerelease channels

An open, non-draft pull request can be published to the npm beta dist-tag after its Lint, E2E Screenshot Tests Pull Request, and Package Candidate workflows pass. A repository owner or maintainer must add a comment whose entire body is:

/beta

The request authorizes only the pull request head SHA and base branch that existed when the comment was added. The workflow revalidates the owner or maintainer permission, head SHA, and base branch immediately before publishing. Any new commit or retargeting invalidates the request; the new state must pass CI and receive a fresh owner or maintainer /beta comment. Fork pull requests are supported. Pull requests that change a release-gating workflow cannot be beta-published until those workflow changes land on their target branch.

Beta versions use <base>-beta.pr<PR number>.sha<12-character SHA>. The pull request receives a comment containing the immutable version and exact npm install command.

When a pull request is merged into main or ios26, it is automatically published to the npm beta dist-tag only after Lint, E2E Screenshot Tests, and Package Candidate all succeed for that exact merge commit. Direct pushes do not publish a candidate. Merge candidates use <base>-beta.pr<PR number>.sha<12-character SHA> and the merged pull request receives the exact install command.

Candidate code is built in a read-only workflow without npm publishing credentials. The privileged release workflow never checks out or executes pull request code; it revalidates the source workflow and package identity, then publishes only the immutable packed artifact with lifecycle scripts disabled. The install-command comment is a separate best-effort notification and cannot invalidate a successful npm publish.

Only npm run release can create a release tag. Stable ios27-vX.Y.Z tags (major, minor, or patch releases) publish to npm latest; revision/prerelease tags publish to next. Neither beta nor next publishing changes the npm latest dist-tag.

Maintainers

• rdlabo