ionic-team/ionic-framework

A cross-platform UI toolkit for building native-quality mobile + PWA apps from web technologies — works with React, Vue, Angular, and vanilla web components.

What it is

A web-components-based UI library targeting mobile + PWA. Wraps standard HTML/CSS/JS with iOS-style and Material-Design components that render natively-looking on each platform. Pairs with Capacitor (also from Ionic Team) for native-app shells around the web view. Used heavily for cross-platform mobile apps where the team has web skills.

Key features

Web Components implementation (works with React, Vue, Angular, or vanilla).
iOS + Material Design themes per platform.
Capacitor companion for native-app shells (camera, geolocation, native plugins).
PWA-ready out of the box.
StencilJS-built components.
MIT-licensed.

Tech stack

TypeScript primary.
StencilJS for web-component compilation.
Web Components standard for framework-agnostic distribution.

When to reach for it

You're a web team shipping mobile + PWA from one codebase.
You want platform-native-looking UI without writing native code.
You need a managed Capacitor / Cordova bridge to native APIs.

When not to reach for it

You want true-native UI fidelity — React Native, Flutter, native frameworks are closer-fit.
You want zero abstraction overhead — Ionic's web-components add some.

Maturity signal

53k stars, 13k forks, MIT, actively maintained under Ionic Inc. 11+ years.

Alternatives

React Native — for true native UI with React.
Flutter — for cross-platform with custom rendering.
Capacitor (same team) — use standalone for web-app-in-native-shell.

Wiki: ionic-team/ionic-framework