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JAVASCRIPT Snippets.

Curated list of production-ready JAVASCRIPT scripts and coding solutions.

JAVASCRIPT

Auto-Focus an Input Field with useRef

Learn how to use React's `useRef` hook to programmatically focus an input field or interact directly with other DOM elements after component mounts.

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JAVASCRIPT

Memoize Callback Functions with useCallback

Optimize React performance with `useCallback`. Prevent unnecessary child component re-renders by memoizing functions passed as props, ensuring stable references.

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JAVASCRIPT

Memoize Expensive Computations with useMemo

Boost React performance with `useMemo`. Cache results of expensive computations or object creations, preventing re-computation on every render for efficiency.

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JAVASCRIPT

Manage Complex State with useReducer

Master React's `useReducer` for complex state management. Centralize logic for states with multiple sub-values or intricate transitions, enhancing predictability.

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JAVASCRIPT

Persist State to Local Storage with useLocalStorage Hook

Build a `useLocalStorage` React hook to easily persist component state in the browser's local storage. Handles initial values, JSON serialization, and updates.

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JAVASCRIPT

Implement a `useDebounce` Hook for Input Throttling

Create a custom React `useDebounce` hook to delay value updates, perfect for search inputs, API calls, and other performance-sensitive operations, preventing excessive re-renders.

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JAVASCRIPT

Centralize Global Event Listener Management with `useEventListener`

Implement a flexible `useEventListener` React hook to easily attach and clean up event listeners to the window, document, or any DOM element, simplifying event handling.

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JAVASCRIPT

Manage Asynchronous Operations and Loading States with `useFetch`

Create a `useFetch` React hook to handle data fetching from APIs, managing loading states, error handling, and the fetched data in a clean, reusable pattern.

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JAVASCRIPT

Simplify Array State Management with a `useArray` Hook

Develop a `useArray` React hook to streamline operations on an array state, providing convenient functions for adding, removing, updating, and clearing elements.

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JAVASCRIPT

Implement Essential Security HTTP Headers in Express.js

Enhance web application security by implementing critical HTTP response headers like HSTS, X-Frame-Options, and others in your Express.js server for robust protection.

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JAVASCRIPT

Configure Secure Session Cookies in Express.js

Strengthen your Express.js application's session management by properly configuring `HttpOnly`, `Secure`, and `SameSite` flags for all cookies to prevent common attacks.

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JAVASCRIPT

Securely Configure CORS for REST APIs in Express.js

Learn to implement a secure Cross-Origin Resource Sharing (CORS) policy in your Express.js API to control access from different origins and protect your resources effectively.

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