Premium
JAVASCRIPT Snippets.

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

JAVASCRIPT

Setting Secure, HTTPOnly, and SameSite Cookie Attributes

Learn to configure essential security attributes (Secure, HTTPOnly, SameSite) for cookies in Express.js to protect against XSS, CSRF, and session hijacking vulnerabilities.

View Snippet →
JAVASCRIPT

Server-Side Input Validation and Sanitization with Express.js

Implement robust server-side input validation and sanitization using `express-validator` to prevent common web vulnerabilities like XSS, SQL injection, and malformed data.

View Snippet →
JAVASCRIPT

Implementing API Rate Limiting to Prevent Abuse

Protect your API endpoints from brute-force attacks and abuse by implementing effective rate limiting using the `express-rate-limit` middleware in Node.js.

View Snippet →
JAVASCRIPT

Custom useNetworkStatus Hook for Online/Offline Detection

A React custom hook to efficiently track and react to changes in the user's network connection status (online or offline), enhancing UI responsiveness.

View Snippet →
JAVASCRIPT

Custom useElementDimensions Hook for Tracking DOM Element Size

A React hook that provides dynamic dimensions (width, height, position) of a specified DOM element, useful for responsive layouts and animations.

View Snippet →
JAVASCRIPT

Custom usePrevious Hook for Storing Past State/Props

A simple and powerful React custom hook that tracks and returns the previous value of any state or prop, ideal for comparing values across re-renders.

View Snippet →
JAVASCRIPT

Custom useCountdown Hook for Timer Functionality

A flexible React custom hook to create and manage countdown timers, perfect for displaying time remaining, limited-time offers, or game mechanics.

View Snippet →
JAVASCRIPT

Custom useOnScreen Hook for Element Visibility Detection

A React custom hook that uses the Intersection Observer API to detect if a specified DOM element is visible within the viewport, ideal for lazy loading or animations.

View Snippet →
JAVASCRIPT

Global Theme Toggle with useContext

Learn to implement a global theme toggle in React applications using useContext for efficient state sharing without prop drilling, improving UI consistency.

View Snippet →
JAVASCRIPT

Managing Complex Form State with useReducer

Simplify complex form state logic in React by using the useReducer hook. Ideal for forms with multiple fields and intricate validation or submission flows.

View Snippet →
JAVASCRIPT

Custom useFetch Hook for API Data

Create a reusable custom useFetch hook in React to elegantly handle data fetching from APIs, managing loading, error, and success states for cleaner components.

View Snippet →
JAVASCRIPT

Optimizing Expensive Computations with useMemo

Use the React useMemo hook to memoize and cache the results of expensive calculations, preventing unnecessary re-renders and boosting performance in your components.

View Snippet →