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Frontend Frameworks

Frontend Frameworks Used by Websites — How to Detect Them

The frontend framework a website uses shapes its performance, developer experience, and architecture. Detecting React, Vue, Angular, or Svelte tells you how a team builds and maintains their UI.

This guide covers the frontend frameworks detected by TrueTechFinder, how each one works, and how to identify which framework any website is using instantly.

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✔ Frontend frameworks covered✔ Libraries · SSR · Full MVC · Mobile✔ Free detection — no signup

Definition

A frontend framework is a pre-structured JavaScript toolkit for building user interfaces. Frameworks like React provide reusable components, state management, and a rendering model. Full-stack frameworks like Next.js (built on React) add server-side rendering, routing, and API capabilities — forming the foundation of most modern web applications.

What Are Frontend Frameworks?

Frontend frameworks define how a website's user interface is built, rendered, and updated. They determine development speed, team structure, performance characteristics, and long-term maintainability.

  • ✔Power the vast majority of modern web applications and SPAs
  • ✔Provide reusable component models that speed up development dramatically
  • ✔Influence page rendering strategy — CSR, SSR, SSG, or hybrid
  • ✔Leave detectable fingerprints in JavaScript bundles and browser globals
  • ✔Signal team culture — React for modern product teams, Angular for enterprise
  • ✔Are a key signal when assessing a competitor's frontend engineering approach

Does This Website Use React?

TrueTechFinder detects React and other frontend frameworks on any website in seconds.

React →
  • ✔ Identify the frontend framework behind any competitor or product site
  • ✔ Understand technical architecture and team approach
  • ✔ No signup or API key required
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Frontend Frameworks Detected

TrueTechFinder detects these frameworks across millions of websites.

React

JavaScript UI Library

The world's most popular JavaScript UI library. Built by Meta, React powers everything from simple landing pages to complex web applications used by billions of people.

Best for: SaaS products, web apps, developer teams, component-driven UI

View full profile →

How to Detect a Website's Frontend Framework

Method 1TrueTechFinder (Recommended)

Enter any URL for an instant framework detection report based on JavaScript bundle analysis.

React
__REACT_DEVTOOLS_GLOBAL_HOOK__
Next.js
__NEXT_DATA__ in HTML
Method 2Check browser console and global variables

Open DevTools → Console. Type these globals to detect frameworks:

  • React: window.__REACT_DEVTOOLS_GLOBAL_HOOK__
  • Vue: window.__vue_app__ or document.querySelector('[data-v-]')
  • Angular: window.ng
Method 3Inspect HTML attributes and script filenames

View page source and look for framework-specific patterns:

  • React/Next.js: id="__NEXT_DATA__" script tag, /_next/static/ paths
  • Vue: data-v-* attributes on DOM elements
  • Angular: ng-version attribute on root element

Why Frontend Framework Detection Matters

🏗️

Architecture Intelligence

Framework choice reveals rendering strategy, component architecture, and likely build tooling and deployment approach.

👥

Hiring & Talent Research

Engineers use framework detection to understand a company's tech stack before applying for or assessing developer roles.

💼

Sales Prospecting

Framework detection helps tool vendors target the right developer audience — React teams vs. Angular shops have different needs.

🔍

Competitive Benchmarking

Compare your frontend stack against competitors to understand technical parity or identify modernisation opportunities.

Types of Frontend Frameworks

⚛️

JavaScript UI Libraries

Flexible, component-based libraries for building user interfaces. Teams choose their own routing, state management, and tooling.

Examples: React, Preact, Solid.js, Alpine.js

🧩

Full-Stack / SSR Frameworks

Opinionated frameworks built on top of UI libraries that add server-side rendering, routing, and data fetching conventions.

Examples: Next.js (React), Nuxt.js (Vue), SvelteKit, Remix

🏗️

Full MVC Frameworks

Comprehensive, opinionated frontend frameworks with built-in solutions for routing, state, forms, and HTTP communication.

Examples: Angular, Ember.js, Backbone.js

📱

Mobile / Cross-Platform

Frameworks that target native mobile apps, progressive web apps, or multiple platforms from a single JavaScript codebase.

Examples: React Native, Ionic, Flutter Web, NativeScript

Ready to detect any website's frontend framework?

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Explore Frontend Framework Profiles

React

JavaScript UI Library

Frequently Asked Questions

What is a frontend framework?
A frontend framework is a pre-built structure of code — typically in JavaScript — that provides reusable patterns, components, and tools for building user interfaces. Instead of writing every piece of UI logic from scratch, developers use frameworks like React, Vue, or Angular to build applications faster and with more consistency. Most modern websites and web apps are built on at least one frontend framework.
How can I detect which frontend framework a website uses?
TrueTechFinder detects frontend frameworks by analysing the JavaScript loaded on a page — looking for characteristic variable names, bundle signatures, and runtime markers. React sites expose a __REACT_DEVTOOLS_GLOBAL_HOOK__ object in the browser. Vue sites load vue.js or expose a __vue_app__ global. Enter any URL at TrueTechFinder for an instant framework detection report.
Is React free to use?
Yes. React is free, open source, and licensed under the MIT licence. It is maintained by Meta (Facebook) and a large community of contributors. There are no licensing costs, usage fees, or enterprise tiers. React can be used in both commercial and non-commercial projects at no cost.
React vs Vue vs Angular — which is best?
All three are excellent choices for different contexts. React is the most popular and has the largest ecosystem — ideal for flexible, component-driven apps. Vue is developer-friendly with a gentler learning curve and strong community in Asia and Europe. Angular is the most opinionated and comprehensive — popular in enterprise environments. The 'best' choice depends on team experience, project requirements, and ecosystem preferences.
What is Next.js and how does it relate to React?
Next.js is a full-stack framework built on top of React. While React is a UI library that handles component rendering, Next.js adds conventions for file-based routing, server-side rendering (SSR), static site generation (SSG), API routes, and image optimisation. Most production React apps are actually Next.js apps. Next.js is maintained by Vercel.
Why is React so popular in 2026?
React's popularity stems from its large ecosystem, massive talent pool, strong backing from Meta, and flexible architecture. The rise of Next.js as the dominant full-stack React framework reinforced adoption. React's component model, hooks, and the React Server Components approach have kept it competitive against newer frameworks like Svelte and Solid despite their performance advantages.

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