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JavaScript

JavaScript is the world's most widely used programming language, running in every web browser and powering the majority of the internet's interactive experiences. From frontend UIs to Node.js backends, serverless functions, and mobile apps with React Native, JavaScript skills are the most broadly applicable in software development.

What is JavaScript?

JavaScript is the only programming language native to web browsers. The modern JavaScript ecosystem spans React, Vue, Angular, and Svelte for frontend; Node.js, Deno, and Bun for server-side; TypeScript for type safety; and Jest, Vitest, and Playwright for testing. ES2015+ features — arrow functions, destructuring, async/await, modules — are now standard and essential knowledge.

Why JavaScript matters for your career

JavaScript fluency is a prerequisite for frontend development and increasingly for full-stack work. The sheer scale of the JavaScript ecosystem means that strong JS engineers can find work everywhere — from startups to FAANG. TypeScript in particular has become standard in professional engineering teams and dramatically improves code quality.

Career paths using JavaScript

JavaScript skills are foundational for Frontend Developer, Full-Stack Developer, React Developer, Node.js Engineer, and JavaScript Architect roles. TypeScript is now expected for senior roles at most tech companies.

Practice JavaScript with real challenges

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React Quiz

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JavaScript ES6 Basics

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React Quiz — Interview Prep

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JavaScript Quiz — Interview Prep

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Frequently asked questions

Should I learn JavaScript or TypeScript?▼

Learn JavaScript foundations first, then adopt TypeScript immediately — ideally within weeks. Nearly all professional React and Node.js work is done in TypeScript, and employers expect it.

What's the scope of JavaScript beyond web browsers?▼

JavaScript runs everywhere: servers (Node.js), mobile apps (React Native, Ionic), desktop apps (Electron), serverless functions, IoT devices, and browser extensions. It's the closest thing to a universal programming language.

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TypeScriptReactNode.jsHTML5CSSVue.jsNext.jsExpress.jsMongoDBGit

Prove your JavaScript skills on Talento

Talento connects developers and engineers to companies through practical, AI-graded challenges. Instead of screening on a CV bullet point, hiring teams post real tasks that reflect day-to-day work — and candidates complete them to earn a verified score visible on their public profile.

Browse the open JavaScript jobs above, attempt a challenge to build your track record, or explore related skills that companies often pair with JavaScript in their requirements.