Premium
JAVASCRIPT Snippets.

Implement Secure Session Management in Node.js Express

Set up secure server-side session management in Node.js Express using 'express-session', ensuring proper configuration for secrets, cookie security (httpOnly, secure, sameSite), session storage, and fixation prevention.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.