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JAVASCRIPT Snippets.

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

JAVASCRIPT

Implement CSRF Protection in Express.js

Secure your Express.js applications against Cross-Site Request Forgery (CSRF) attacks by generating and validating CSRF tokens with the 'csurf' middleware.

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JAVASCRIPT

Secure Password Hashing with bcrypt.js

Learn to securely hash and verify user passwords in Node.js applications using the robust 'bcrypt.js' library to prevent credential theft and enhance security.

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Enhance Web Security with HTTP Security Headers

Improve your Node.js application's security posture by setting essential HTTP headers like CSP, HSTS, and X-Frame-Options using the 'helmet' middleware for Express.

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Sanitize HTML Input to Prevent XSS Attacks

Effectively prevent Cross-Site Scripting (XSS) vulnerabilities in your web applications by sanitizing untrusted HTML input using the robust DOMPurify library.

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Storing Previous State or Prop Values with `usePrevious`

Learn how to create a custom `usePrevious` React hook to easily access the prior value of any state or prop, essential for comparing changes in components.

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Debouncing Input Values and Functions with `useDebounce`

Implement a custom `useDebounce` React hook to delay state updates or function calls, optimizing performance for search inputs or frequent events.

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Throttling Expensive Operations with `useThrottle` Hook

Discover how to create a `useThrottle` React hook to control the execution rate of functions, preventing performance issues from rapid event firing like scrolling or resizing.

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Persisting React State with `useLocalStorage` Hook

Build a `useLocalStorage` React hook to automatically save and load component state from the browser's local storage, ensuring data persistence across sessions.

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Detecting Element Visibility with `useIntersectionObserver`

Create a custom `useIntersectionObserver` React hook to efficiently detect when a DOM element enters or exits the viewport, ideal for lazy loading and animations.

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Simplify Boolean State with useToggle Hook

Effortlessly manage boolean states in React components using a custom `useToggle` hook, providing a simple function to switch values.

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Detect Clicks Outside an Element with useOutsideClick

Implement common UI patterns like closing modals or dropdowns when clicking outside, using a custom React `useOutsideClick` hook.

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Attach and Clean Up Event Listeners with useEventListener

A versatile React hook to simplify adding and removing event listeners on DOM elements or the global window/document, ensuring proper cleanup.

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