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JAVASCRIPT Snippets.

Executing Parallel API Requests with Promise.all

Learn to make multiple API requests concurrently using JavaScript's `Promise.all`, significantly improving loading times for independent data fetches.

Exponential Backoff Retry for API Calls

Implement an exponential backoff strategy in JavaScript to gracefully retry failed API requests, improving resilience for intermittent network or server issues.

Efficiently Append Multiple Elements Using DocumentFragment

Optimize DOM updates by creating and appending multiple elements simultaneously using DocumentFragment. This reduces reflows and repaints, improving web application performance.

Toggle CSS Class on an Element

Learn how to dynamically add or remove a CSS class from an HTML element using JavaScript's `classList.toggle()`, perfect for interactive UI elements like menus or modals.

Update Sibling Element's Content on Event

Discover how to navigate the DOM to find and update a specific sibling element's content based on an event trigger, crucial for building dynamic and interconnected UI components.

Implement API Rate Limiting with Redis for Brute Force Protection

Secure your API endpoints by implementing robust rate limiting using Redis, preventing brute-force attacks and service abuse in Node.js Express applications.

Set Secure and HttpOnly Cookies in Node.js Express

Learn to set secure cookies in Node.js Express applications, using `HttpOnly` to prevent XSS access and `Secure` to ensure cookies are sent only over HTTPS.

Sanitize User-Generated HTML to Prevent XSS with DOMPurify

Utilize DOMPurify, a robust XSS sanitizer, to clean untrusted HTML input from users, effectively preventing cross-site scripting vulnerabilities in web applications.

Implement CSRF Protection in Node.js Express Applications

Add Cross-Site Request Forgery (CSRF) protection to your Express.js applications using the csurf middleware to secure form submissions and state-changing requests.

React `useLocalStorage` Hook for Persisted State

Learn to persist React state effortlessly across page refreshes using the `useLocalStorage` custom hook. Ideal for user preferences or theme settings.

React `usePrevious` Hook to Access Previous State or Prop Values

Discover how to easily get the previous value of any state or prop in React components using the `usePrevious` custom hook, essential for diffing updates.

React `useMediaQuery` Hook for Responsive Components

Build truly responsive React components by reacting to CSS media queries dynamically with the `useMediaQuery` hook, adapting UI to screen sizes.