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JAVASCRIPT Snippets.

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

JAVASCRIPT

Implement API Rate Limiting for Node.js Express Endpoints

Protect Node.js API endpoints from brute-force attacks, denial-of-service, and abuse by implementing effective rate limiting using the 'express-rate-limit' middleware with global and specific endpoint configurations.

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JAVASCRIPT

Custom React Hook for Local Storage Persistence

A React hook to seamlessly synchronize component state with the browser's local storage, ensuring data persistence across sessions. Ideal for settings, user preferences, or form data.

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Custom React Hook to Detect Clicks Outside an Element

Implement a React hook to easily detect clicks occurring outside a specified DOM element. Perfect for closing modals, dropdowns, or popovers when users click away.

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Custom React Hook for Dynamic Window Dimensions

A React hook that provides real-time updates for the browser window's width and height. Essential for creating responsive components that adapt to screen size changes.

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Custom React Hook for Element Visibility Detection

A React hook leveraging the Intersection Observer API to detect when an element enters or exits the viewport. Ideal for lazy loading images, infinite scrolling, or scroll-triggered animations.

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Custom React Hook for Asynchronous Data Fetching

Manage the lifecycle of any asynchronous operation (loading, error, data) with a clean, reusable React hook. Simplifies data fetching and state management for API calls.

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Implementing CSRF Protection with csurf Middleware in Node.js

Protect your Node.js Express application from Cross-Site Request Forgery (CSRF) attacks using the `csurf` middleware for token-based validation.

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Sanitizing User-Generated HTML Content Before Display in JavaScript

Safely display user-provided HTML content in your web application by sanitizing it to prevent Cross-Site Scripting (XSS) vulnerabilities using DOMPurify.

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Validate Strong Passwords with Multiple Criteria

Implement a regex pattern to enforce strong password policies, requiring uppercase, lowercase, numbers, and special characters for enhanced security.

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Generate URL-Friendly Slugs from Strings

Discover how to transform any string into a clean, URL-friendly slug by lowercasing, replacing spaces, and removing special characters with regex.

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Extract Specific Data Attributes from HTML Strings

Use regex to efficiently extract values from specific `data-*` attributes within an HTML string, useful for custom templating or parsing.

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Set Secure HTTP-Only Cookies with Node.js Express

Learn to securely set cookies in Node.js Express applications, using HttpOnly, Secure, and SameSite attributes to protect against XSS and CSRF attacks.

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