JavaScript library for building component-based UIs with a virtual DOM; the core framework used throughout this course.

Typed superset of JavaScript that compiles to plain JS; catches type errors at compile time before they reach the browser.

Fast frontend build tool and dev server using ES modules; provides instant Hot Module Replacement (HMR) during development.

Reusable UI building block in React — a function that returns JSX and can accept props to customize its output.

React function (useState, useEffect, etc.) for managing state and side-effects in functional components without classes.

Utility-first CSS framework; style elements directly with class names like flex, p-4, text-blue-500.

End-to-end browser testing framework; scripts simulate real user interactions (click, type, navigate) across Chrome/Firefox/Safari.

Anthropic's AI terminal agent for pair programming; reads your codebase and executes multi-step edits from natural-language prompts.

AI-powered code editor (VS Code fork) with inline AI chat and diff-apply features; shows proposed changes before you accept them.

Frontend cloud platform for deploying React/Next.js apps; creates a live preview URL for every branch automatically.

HTTP-based service interface; the frontend fetches UCC filing data via GET/POST calls to the Spring Boot backend.

Patterns for keeping UI data consistent across components; this course uses React useState, Context, and custom hooks.

JavaScript/TypeScript linter that enforces code-quality rules; blocks merges when style or security rules are violated.

Custom React component built in Phase 03 that visualizes lien-risk as a color-coded meter based on OpenSpec field data.

Spec-driven AI workflow tool that locks in field contracts between the React frontend and the Spring Boot API so AI-generated code stays in sync.