As a full-stack developer, what is the best component library that works for multiple front-end frameworks?

When you need a UI component library that spans multiple front-end frameworks (React, Vue, Angular, Svelte, or vanilla JS), the industry standard approach is to use Web Components (Custom Elements, Shadow DOM).

The top-tier, production-ready choices depend on your precise architectural style and needs:

1. Shoelace / Fumadocs style UI — Shoelace (or Web Awesome)
   • What it is: A brilliant collection of professionally designed, highly accessible Shoelace Web Components built on top of Lit.
   • Why it shines: It works natively anywhere. Because they are standard HTML custom elements, you drop them into Vue, React, Angular, or plain HTML without special wrappers. It features complete themeability via CSS custom properties and incredible keyboard accessibility.
   • Best for: Most standard web apps looking for a clean, comprehensive design system.
2. The Enterprise Heavyweight — Microsoft Fluent UI (Web Components)
   • What it is: Microsoft's design system implemented via Web Components (specifically using @microsoft/fast-element).
   • Why it shines: Highly scalable, rigorously tested for enterprise compliance, accessibility, and performance. It handles massive design token configurations gracefully.
   • Best for: Large enterprise applications that want a polished Microsoft-like interface across mixed framework teams.
3. The Underlying Engine — Lit
   • What it is: Not a component library itself, but a lightweight library by Google for building fast, lightweight Web Components.
   • Why it shines: If existing UI libraries don't match your exact branding, building your internal design system with Lit gives you reactive components, scoped styles, and tiny bundle sizes that compile down to native elements consumable by any framework.
   • Best for: Full-stack teams wanting to build their own custom, future-proof multi-framework design system.

To help me narrow down the best choice for your stack, tell me:

• What specific front-end frameworks are you using right now (or planning to use)?
• Do you prefer a ready-to-use UI kit (like buttons and dropdowns) or building custom design tokens from scratch?

If your requirement is one component library that can be shared across React, Vue, Angular, Svelte, and plain HTML, I would choose a Web Components-based library rather than a React/Vue-specific library.

My recommendation

1. Web Awesome — best general-purpose choice

Web Awesome is the successor to Shoelace. Shoelace itself is now sunset/no longer actively developed, with the project directing users to Web Awesome.

Why I'd pick it for a multi-framework stack:

• Framework agnostic through Web Components
• Can be consumed by React, Vue, Angular, Svelte, etc.
• Good accessibility foundation
• Customizable styling/design tokens
• Components aren't tied to the lifecycle of a particular frontend framework
• Particularly good for organizations maintaining several frontend applications

The architectural advantage is important: instead of maintaining Button implementations for React, Vue, and Angular, you maintain one <wa-button>-style Web Component and consume it from each framework.

2. Adobe Spectrum Web Components — best enterprise/design-system choice

Adobe's Spectrum Web Components is probably my pick if you're building an enterprise product and want a more opinionated, mature design system.

Adobe explicitly describes it as designed to work with any web framework—or without one.

It provides a substantial component set—buttons, dialogs, menus, forms, tables, tabs, tooltips, etc.—and is built with Lit and TypeScript.

The downside is that you're adopting Adobe's Spectrum visual language, so it's less attractive if you're building a completely custom brand.

3. Build your own components with Lit — best for a serious custom design system

If you're a full-stack team building a product used by multiple frontend teams, I'd seriously consider:

Lit + Web Components + your own design tokens

That gives you:

                Design Tokens
                     │
                     ▼
              Lit Web Components
                     │
        ┌────────────┼────────────┐
        ▼            ▼            ▼
      React         Vue         Angular
        │            │            │
        ▼            ▼            ▼
      App A         App B        App C

This is particularly compelling if you're dealing with micro-frontends or expect your frontend technology to change over the lifetime of the product.

What I would choose

One important distinction: if you mean "I want the same visual design across multiple frameworks," use Web Components. If you mean "I want the same underlying component APIs but framework-native implementations," I'd approach it differently.

For a new full-stack project where I knew React today, but potentially Vue/Angular/Svelte tomorrow, I'd choose Web Components as the foundation, with Web Awesome if its design language fits, or Lit if I wanted complete control.

If you tell me your stack (e.g. React + Angular + Vue, Tailwind, Next.js, micro-frontends, enterprise SaaS), I can narrow this down to the best architecture rather than just the best library.

As a full-stack developer looking for a component library that isn't locked into a single front-end framework (like React or Angular), the absolute gold standard approach is leveraging Web Components (Custom Elements, Shadow DOM, and ES modules). Because Web Components are native browser primitives, they work identically in vanilla HTML, React, Vue, Angular, Svelte, and SolidJS.

The top multi-framework UI libraries fall into a few clear categories depending on your exact design and engineering needs:

• Shoelace (rebranding to Web Awesome): Shoelace is widely considered one of the best designed, thoroughly documented, and deeply accessible framework-agnostic component libraries available. Built using native web components (via Lit), it works natively in any framework, features first-class dark mode support, and gives you deep styling control via CSS Custom Properties. (Note: Shoelace has transitioned under Font Awesome into Web Awesome , making it an even stronger long-term bet with massive icon ecosystem backing).
• Lit: If you want to build custom multi-framework elements rather than just consuming an off-the-shelf library, Lit (by Google) is the premier lightweight library for building fast, enterprise-grade Web Components. Major design systems use Lit under the hood because its reactive template system is blazing fast and has almost zero framework overhead.
• Ionic (Core/Stencil): If your project leans mobile, desktop-hybrid, or progressive web app (PWA), Ionic is a powerhouse. Built on Stencil (their own web component compiler), Ionic’s core components render beautifully and natively across Angular, React, and Vue with dedicated wrappers for each ecosystem.
• PrimeVue / PrimeFaces / PrimeReact ecosystem: While technically a family of separate framework-specific libraries rather than pure Web Components, the PrimeTek suite offers an identical component API, design language, and behavior across React, Vue, and Angular. If your stack involves multiple distinct front-end apps sharing the same team and design language, using parallel Prime libraries provides a remarkably consistent developer experience.

The Full-Stack Verdict

If you need a drop-in UI toolkit that works across everything without complex framework wrappers, Shoelace / Web Awesome is the premier choice. If you are tasked with architecting a custom design system meant to be distributed across disparate internal teams using different frameworks, building upon Lit is the modern industry standard.

To help narrow down the best fit, tell me:

• What front-end frameworks are you targeting in your stack?
• Are you looking for ready-to-use UI components (buttons, dropdowns, modals) or a base tool to build a custom design system?

If your main requirement is one component library that can be shared across React, Vue, Angular, and potentially other front-end stacks, I’d choose Ionic for most full-stack teams.

My ranking

🥇 Best overall: Ionic

Ionic is particularly attractive because its underlying components are Web Components, rather than being fundamentally tied to React, Vue, or Angular. Ionic provides official integrations for React, Vue, and Angular, while the underlying components can also be used without a framework.

That makes this architecture possible:

                 Design System
                      │
               Ionic Components
                      │
        ┌─────────────┼─────────────┐
        │             │             │
      React          Vue         Angular
        │             │             │
      App A          App B        App C

The big advantage for a full-stack developer is that you can establish one component vocabulary across multiple applications without maintaining separate React/Vue/Angular implementations.

Ionic 9 is also current as of 2026 and has specifically updated its React, Vue, and Angular integrations.

🥈 Web-first alternative: Web Awesome

I'd seriously consider Web Awesome if these are primarily web applications rather than mobile/hybrid applications.

The underlying approach is similar: Web Components give you framework independence. The predecessor, Shoelace, is now sunset in favor of Web Awesome, and its documentation explicitly targets React, Vue, Angular, and Svelte.

This is especially appealing if you want something like:

<wa-button variant="primary">
  Save
</wa-button>

and don't want your design system to care whether the consuming application is React, Vue, Angular, Svelte, or vanilla JS.

What I'd choose

For a company with multiple front-end applications:

Ionic → best overall choice

For a custom enterprise design system that must survive framework changes:

Web Components + Web Awesome → arguably the better architectural choice

For a React-only product:

MUI, Radix, shadcn/ui, or similar React-native solutions would generally be preferable to Ionic.

One important distinction: "supports multiple frameworks" isn't the same as "has a shared component implementation." If your real goal is something like "we have React + Angular + Vue apps and want to build our own reusable design system once" then I'd approach the architecture somewhat differently.

If that's your situation, I can lay out a 2026 recommended stack for a cross-framework design system (Web Components vs Ionic vs Tailwind vs Storybook, package structure, TypeScript, theming, and monorepo setup).

If your main requirement is one component library that can be shared across React, Vue, Angular, Svelte, and plain HTML, I’d choose a Web Components–based library rather than a React/Angular-specific library.

My recommendation

1. Web Awesome — best overall choice

The former Shoelace project has been sunset in favor of Web Awesome. Shoelace’s own site now explicitly directs new development to Web Awesome. Its core approach is Web Components, which means the components aren't tied to a particular frontend framework.

Why I like this for a full-stack developer:

• React, Vue, Angular, Svelte, and vanilla JS support
• Web-standard Custom Elements rather than framework-specific components
• TypeScript-friendly
• CSS customization/theming
• Good accessibility focus
• Can be shared between completely different applications
• Particularly good for micro-frontends and organizations with multiple frontend stacks

The architecture is essentially:

                 ┌──────────────────┐
                 │  Design System   │
                 │  Web Components  │
                 └────────┬─────────┘
                          │
        ┌─────────┬───────┼────────┬──────────┐
        ▼         ▼       ▼        ▼          ▼
      React      Vue    Angular  Svelte     HTML

That's a much better long-term architecture than maintaining:

React components
Vue components
Angular components
Svelte components

Other strong options

Vaadin is particularly mature if you're building enterprise applications. Its components are based on the Web Components standard and are framework-agnostic, with 40+ components currently available.

mdui is interesting if you specifically want Material Design 3; it is built entirely around Web Components and explicitly supports React, Vue, Angular, and other frameworks.

UWC Components is another newer option emphasizing browser-native APIs, zero dependencies, and compatibility with React 18/19, Angular, Vue, and Lit.

One important distinction

If you're asking "What library should I use to build a component library that my company will consume from multiple frameworks?", my answer changes slightly:

Use Lit + your own design system, potentially using Web Awesome as the base.

Lit is a particularly good foundation for creating your own framework-agnostic components. Web Components are also well supported by Vue and can be consumed as custom elements rather than Vue-specific components.

So I'd rank the approaches:

1. Web Awesome — best if you want an existing component library.
2. Lit + custom design system — best if you're building your company's long-term design system.
3. Vaadin — excellent for enterprise-heavy CRUD/data-entry applications.
4. mdui — excellent if you want Material 3.
5. Framework-specific libraries such as MUI, PrimeVue, Angular Material, etc. — avoid if cross-framework reuse is a hard requirement.

For a full-stack developer starting a new multi-frontend platform today, I'd personally go with Web Components + Lit, with Web Awesome if its visual language fits the product. The key is making the component API framework-independent rather than trying to create React/Vue/Angular versions of the same component.

React components
Vue components
Angular components
Svelte components

Other strong options

Vaadin is particularly mature if you're building enterprise applications. Its components are based on the Web Components standard and are framework-agnostic, with 40+ components currently available.

mdui is interesting if you specifically want Material Design 3; it is built entirely around Web Components and explicitly supports React, Vue, Angular, and other frameworks.

UWC Components is another newer option emphasizing browser-native APIs, zero dependencies, and compatibility with React 18/19, Angular, Vue, and Lit.

One important distinction

As a full-stack developer working across multiple front-end frameworks, your best path forward is utilizing a Web Component-based (framework-agnostic) library. Because Web Components are built directly on native browser standards (Custom Elements, Shadow DOM, and HTML Templates), they work seamlessly in React, Vue, Angular, Svelte, or even plain HTML without caring what powers the rest of your app.

The top-tier options vary based on your exact ecosystem and architectural philosophy:

• • Shoelace (transitioning to Web Awesome): Widely considered one of the cleanest, most developer-friendly collections of native web components. It features a gorgeous design, built-in dark mode support, and deep customization via CSS custom properties (design tokens). (Note: Shoelace's ecosystem has evolved into Web Awesome via Font Awesome, making it heavily backed and future-proof).
• • Ionic (Ionic Core): While historically known for mobile hybrid apps, Ionic Core is an incredible framework-agnostic web component library. If you need robust mobile gestures, animations, high-performance routing components, and polished desktop UI elements that look native everywhere, Ionic is battle-tested.
• • Microsoft FAST / Fluent UI Web Components: An adaptive, high-performance enterprise-grade library built by Microsoft. Perfect if you need a design system that scales heavily and implements enterprise-level accessibility and data density.
• • Tailwind CSS + daisyUI: While not a traditional JS component library, using daisyUI on top of Tailwind provides pure CSS/semantic component classes (btn, card, modal ). It is entirely framework-agnostic because it compiles down to standard HTML/CSS, meaning you can copy-paste or use the exact same classes across React, Vue, Astro, or Laravel.

How to Choose:

• Choose Shoelace / Web Awesome if you want clean, standard, accessible UI primitives (<sl-button>, <sl-dialog> ) that drop into any framework cleanly.
• Choose Ionic if your multi-framework app requires heavy mobile/touch optimization or native-feeling mobile components.
• Choose Tailwind + daisyUI if you prefer utility-first styling control over pre-packaged web component logic.

If you can share:

• Whether you are building an enterprise dashboard , a mobile-first PWA , or a public design system
• Which specific frameworks you need to support right now

I can give you a tailored recommendation and a quick implementation blueprint.

If you mean one UI/component library that can be shared across React, Vue, Angular, and potentially other front-end stacks, my top choice is Ionic—but there’s an important distinction depending on what you’re building.

My recommendation

🥇 Best overall: ionic.io

Ionic is built around Web Components, so the underlying UI components aren't tightly coupled to a particular framework. It has first-class integrations for React, Angular, and Vue, and can also be used without a framework.

That makes it particularly attractive if you're building, for example:

                 Shared Design System
                         │
             ┌───────────┼───────────┐
             ▼           ▼           ▼
           React        Vue        Angular
             │           │           │
             └───────────┼───────────┘
                         ▼
                    Ionic Components

You get a common vocabulary of components rather than maintaining:

React → MUI
Vue   → Vuetify
Angular → Angular Material

which inevitably creates three different design systems.

Ionic currently provides 100+ UI components, TypeScript support, dark mode, accessibility features, and integrations for React, Vue, and Angular.

🥈 Best if you want a pure Web Components design system: Web Awesome

There's another option I'd seriously consider for a multi-framework enterprise design system: Web Awesome, the successor to Shoelace.

The important architectural idea is:

                 Web Components
                       │
        ┌──────────────┼──────────────┐
        ▼              ▼              ▼
      React           Vue          Angular

Web Components are framework-independent, so your components can be consumed by different applications without rewriting the underlying component implementation. Shoelace's documentation explicitly describes this advantage and its ability to share components across different frameworks.

I'd lean toward this approach if your goal is "build our company's design system once and consume it everywhere", rather than specifically building a mobile-style application.

The key distinction

What I would do as a full-stack developer

If you're building a new product where you control multiple front ends, I'd actually separate the design system from the framework.

Something like:

packages/
├── design-tokens/
│   ├── colors
│   ├── typography
│   ├── spacing
│   └── themes
│
├── ui/
│   ├── button
│   ├── modal
│   ├── input
│   ├── table
│   └── date-picker
│
├── react/
├── vue/
└── angular/

Use Web Components underneath, with framework-specific wrappers only where they improve developer experience.

That gives you:

• One visual design system
• One accessibility implementation
• One set of design tokens
• React/Vue/Angular compatibility
• Much easier migration if your frontend stack changes
• Ability to use the components in micro-frontends

So, if you want a library you can start using immediately: choose Ionic. If you're architecting a long-lived company-wide design system: I'd choose a Web Components-based architecture, with Web Awesome/Lit as the foundation.

If you tell me whether your stack is React + Angular, React + Vue, or React + Vue + Angular, I can also give you a 2026 comparison of Ionic vs Web Awesome vs PrimeVue/PrimeNG vs MUI, including bundle size, accessibility, theming, SSR/Next.js/Nuxt compatibility, and developer experience.

                 Shared Design System
                         │
             ┌───────────┼───────────┐
             ▼           ▼           ▼
           React        Vue        Angular
             │           │           │
             └───────────┼───────────┘
                         ▼
                    Ionic Components

You get a common vocabulary of components rather than maintaining:

React → MUI
Vue   → Vuetify
Angular → Angular Material

which inevitably creates three different design systems.

Ionic currently provides 100+ UI components, TypeScript support, dark mode, accessibility features, and integrations for React, Vue, and Angular.

🥈 Best if you want a pure Web Components design system: Web Awesome

There's another option I'd seriously consider for a multi-framework enterprise design system: Web Awesome, the successor to Shoelace.

The important architectural idea is:

                 Web Components
                       │
        ┌──────────────┼──────────────┐
        ▼              ▼              ▼
      React           Vue          Angular

Web Components are framework-independent, so your components can be consumed by different applications without rewriting the underlying component implementation. Shoelace's documentation explicitly describes this advantage and its ability to share components across different frameworks.

I'd lean toward this approach if your goal is "build our company's design system once and consume it everywhere", rather than specifically building a mobile-style application.

The key distinction

What I would do as a full-stack developer

If you're building a new product where you control multiple front ends, I'd actually separate the design system from the framework.

Something like:

packages/
├── design-tokens/
│   ├── colors
│   ├── typography
│   ├── spacing
│   └── themes
│
├── ui/
│   ├── button
│   ├── modal
│   ├── input
│   ├── table
│   └── date-picker
│
├── react/
├── vue/
└── angular/

Use Web Components underneath, with framework-specific wrappers only where they improve developer experience.

That gives you:

• One visual design system
• One accessibility implementation
• One set of design tokens
• React/Vue/Angular compatibility
• Much easier migration if your frontend stack changes
• Ability to use the components in micro-frontends

So, if you want a library you can start using immediately: choose Ionic. If you're architecting a long-lived company-wide design system: I'd choose a Web Components-based architecture, with Web Awesome/Lit as the foundation.

If you tell me whether your stack is React + Angular, React + Vue, or React + Vue + Angular, I can also give you a 2026 comparison of Ionic vs Web Awesome vs PrimeVue/PrimeNG vs MUI, including bundle size, accessibility, theming, SSR/Next.js/Nuxt compatibility, and developer experience.

When you need a UI component library that operates across multiple front-end frameworks (React, Vue, Angular, Svelte, or vanilla HTML/JS), the gold standard is Web Components —specifically libraries built on top of Lit or modern design systems compiled to custom elements.

The top multi-framework component libraries rank as follows, based on flexibility, developer experience, and ecosystem maturity:

1. Shoelace (now part of Font Awesome / Web Awesome)

• Under the hood: Built with Lit (Web Components).
• Why it’s great: Shoelace is arguably the cleanest, most well-documented, and pleasant framework-agnostic library available. Because its components are standard custom elements, you drop <sl-button> or <sl-dialog> into React, Vue, Angular, or a plain static HTML page, and it just works. It features a gorgeous, modern default theme and deep CSS-part customization.
• Best for: Developers who want a comprehensive, highly polished set of UI primitives that work everywhere without changing code habits.

2. Ionic (Ionic Framework / Ionic Core)

• Under the hood: Web Components (Stencil compiler).
• Why it’s great: While historically famous for mobile/hybrid apps, Ionic Core is completely decoupled from mobile constraints and serves as a heavy-duty enterprise design system. It explicitly exports native wrappers for React, Angular, and Vue while maintaining a pure Web Component core.
• Best for: Complex cross-platform web and mobile applications requiring mobile-optimized gestures, routing, and high-performance layout components.

3. FAST (by Microsoft)

• Under the hood: Web Components (FAST Element).
• Why it’s great: Backed by Microsoft, FAST provides an infrastructure rather than just static styles. It powers Microsoft's own Fluent UI Web Components. It is ultra-performant, designed for high-density enterprise software, and built natively for adaptability and deep design-system scaling.
• Best for: Enterprise-scale design systems where you need atomic control over performance, memory footprint, and custom design tokens.

Alternative Approach: Tailwind + Copy-Paste Design Systems

If your multi-framework requirement is driven by wanting the same look and feel across apps rather than literally sharing the exact same compiled JS bundle, the industry has heavily shifted toward utility-first styling layers:

• DaisyUI or Preline UI : These sit on top of Tailwind CSS . Because they are pure CSS/HTML patterns (classes) rather than framework-locked JS primitives, you can use the exact same markup patterns across React, Vue, or Svelte by pairing them with your framework of choice.

The Reality Check (Pros & Cons of Web Components)

Before committing to a multi-framework Web Component library, keep these architectural trade-offs in mind:

• The Good: Write once, run everywhere. Zero framework lock-in. Perfect if you maintain a micro-frontend architecture mixing Angular and React teams.
• The Catch: Server-Side Rendering (SSR) and hydration can still be clunky compared to framework-native libraries (like Radix/Shadcn for React or VueUse for Vue). Passing complex nested JavaScript data structures (arrays/objects) sometimes requires explicit property bindings rather than standard HTML attributes.

To help narrow down the ideal choice, let me know:

• Which specific frameworks are you targeting (e.g., React and Vue, or legacy and modern)?
• Do you require heavy Server-Side Rendering (SSR) / SEO optimization, or is it an internal dashboard/SPA?

When you're working across multiple front-end frameworks (or migrating between them), the "best" component library depends on your architecture. As a full-stack developer, you generally want something built on Web Components (Custom Elements) or Utility-First CSS + Semantic Markup so you aren't tied to a specific framework’s runtime. [1]

The top choices for multi-framework component libraries are organized by how they handle the problem:

• Web Awesome (formerly Shoelace) : The gold standard for fully styled, framework-agnostic UI. Built on native web standards, it works identically in React, Vue, Angular, Svelte, or plain HTML. It features great accessibility, built-in themes, and clean APIs without bringing a heavy framework footprint. (Check out Web Awesome for details on their latest releases). [1]
• daisyUI : If your stack uses Tailwind CSS, daisyUI is arguably the most efficient multi-framework approach. It doesn't ship JavaScript framework components; instead, it injects clean, semantic class names (btn, card, modal ) on top of Tailwind. Your framework of choice retains 100% control over state and behavior, making it completely framework-agnostic. (Explore the project at daisyUI). [1][2]
• Ionic (Ionic Framework / Web Components) : If you are building high-performance UIs, PWAs, or mobile-leaning applications, Ionic's core components are compiled as standalone Web Components. You can drop them into Angular, React, or Vue projects and get deeply polished, mobile-optimized navigation, gestures, and inputs out of the box.
• Lit : If you prefer building your own multi-framework design system rather than consuming an off-the-shelf one, Lit (by Google) is the premier lightweight library for building fast, secure, and reactive Web Components. Most enterprise multi-framework component systems use Lit under the hood to compile components that plug into any environment. [1]

To help narrow down the ideal choice for your project, tell me:

• What specific frameworks are you targeting (e.g., React and Vue, or legacy + modern)?
• Are you looking for ready-to-use components or an unstyled/headless primitive approach?
• Are you already using Tailwind CSS in your backend/frontend setup?

If your priority is one UI/component library that can be shared across React, Vue, Angular, Svelte, and plain HTML, I’d choose a Web Components–based library rather than a React/Vue-specific library.

My top picks

🥇 Best overall: Web Awesome

The successor to Shoelace is Web Awesome, which is built around Web Components. The big advantage is that your component isn't actually a React component or Vue component—it is a standard custom element.

So the same component can conceptually be used in:

<wa-button variant="brand">
  Save
</wa-button>

from React, Vue, Angular, Svelte, or vanilla HTML.

The original Shoelace project explicitly emphasizes this model: components work across frameworks, are customizable with CSS, and are designed to let organizations share UI components between applications using different frameworks.

This is the architecture I'd choose if you're building multiple products with different frontend stacks.

🏢 If you're building an enterprise design system: Spectrum

Adobe Spectrum Web Components is another excellent choice. Adobe explicitly describes it as designed to work with any web framework—or without one at all. It's built with Lit and Web Components and provides a fairly comprehensive set of accessible components.

I'd pick Spectrum if you want:

• Strong accessibility
• A mature design language
• Design tokens
• Enterprise-quality components
• React + Vue + Angular + vanilla interoperability
• A standardized visual language across many applications

The downside is that you're effectively adopting Adobe's design system, so it isn't necessarily the best choice if you want a completely custom visual identity.

📱 If mobile is important: Ionic

Ionic is particularly compelling if your stack includes React, Angular, and Vue and you also want to ship mobile applications. Ionic's core components are Web Components, with framework integrations for Angular, React, and Vue.

I'd choose it for something like:

React web app + Angular admin portal + Vue application + iOS/Android app

rather than for a purely desktop/web-oriented enterprise design system.

---

What I'd recommend as a full-stack developer

If you're designing your architecture today, I'd separate the concerns:

                    Design System
                         │
               ┌─────────┴─────────┐
               │                   │
          Design Tokens       Web Components
          colors/spacing       buttons/forms/etc.
               │                   │
       ┌───────┼────────┬──────────┼───────┐
       │       │        │          │       │
     React    Vue    Angular    Svelte   Vanilla
       │       │        │          │       │
       └───────┴────────┴──────────┴───────┘
                         │
                    Backend APIs

This gives you something very valuable: your UI layer isn't coupled to your frontend framework.

For example, if you have:

Frontend A → React
Frontend B → Angular
Frontend C → Vue
Frontend D → Svelte

you don't need:

React component library
Angular component library
Vue component library
Svelte component library

Instead:

                    Web Components
                         ↓
        ┌────────────────────────────────┐
        │ Button │ Modal │ Table │ Input │
        │ Select │ Tabs  │ Card  │ Toast │
        └────────────────────────────────┘
             ↓       ↓       ↓       ↓
           React    Vue    Angular  Svelte

That's a much more sustainable architecture for a multi-frontend organization.

One important caveat

Web Components aren't automatically as pleasant to use as native framework components. Things like form bindings, event typing, slots, controlled state, SSR, and framework-specific reactivity can require extra integration work.

So if you only have one React application, I'd absolutely favor something React-native such as shadcn/ui, Radix, MUI, etc.

But if your requirement is genuinely:

"I need one component library shared by multiple frontend frameworks."

then my ranking is:

1. Web Awesome → best general-purpose choice
2. Adobe Spectrum Web Components → best enterprise/design-system choice
3. Ionic → best cross-framework + mobile choice

The key technology to look for isn't really the brand name—it is Web Components + design tokens + framework adapters.