Modal

A wireframe is a low-fidelity visual representation of a user interface that outlines structure, layout, and content hierarchy without detailed styling or colors. Wireframes focus on what elements appear on a page and how they are arranged, serving as a blueprint before visual design begins. They help teams align on functionality and user flow early in the process, when changes are cheapest to make.

Deep linking is the ability to direct users to a specific screen or content within a mobile or web application via a URL, rather than just opening the app's home screen. In React Native and Flutter, this involves configuring URL schemes (e.g., `myapp://profile/123`) or universal/app links that work across platforms. Deep linking is essential for push notification routing, marketing campaigns, sharing content between users, and creating seamless web-to-app transitions.

Infinite scroll is a UX pattern where new content loads automatically as the user scrolls toward the bottom of the page, eliminating traditional pagination. It's commonly used in social media feeds and content discovery interfaces. While it increases engagement and feels seamless, it can hurt performance without virtualization and makes it difficult for users to reach footer content or bookmark specific positions.

Tree shaking is a dead code elimination technique used by modern bundlers like Webpack, Rollup, and esbuild to remove unused exports from the final JavaScript bundle. It relies on the static structure of ES module `import`/`export` syntax to determine which code is actually referenced and safely discard the rest. For tree shaking to work effectively, libraries must use ESM format and avoid side effects in their module initialization, which is why the `sideEffects` field in `package.json` matters.

A Higher-Order Component (HOC) is an advanced React pattern where a function takes a component as input and returns a new enhanced component with additional props or behavior. Common use cases include adding authentication checks, analytics tracking, or data fetching logic to existing components. While HOCs were a primary code reuse pattern in class-based React, custom hooks have largely replaced them in modern functional component code due to their simpler composition model.

A controlled component is a form element in React whose value is driven by React state rather than the DOM's own internal state. The component's value is set through a `value` prop and updated via an `onChange` handler, giving React full control over the form data. This pattern enables validation on every keystroke, conditional disabling of submit buttons, and enforcing input formats, making it the recommended approach for most form handling in React applications.