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JAVASCRIPT Snippets.

Creating a `useDebounce` Hook for Delayed Value Updates

Learn to create a custom `useDebounce` React hook to delay updates of any value, perfect for optimizing search inputs, filtering, and API calls by reducing unnecessary re-renders or requests.

Syncing React State with Local Storage using `useLocalStorage`

Build a `useLocalStorage` React hook to easily persist and retrieve component state in the browser's local storage, ensuring data remains available across page refreshes.

Tracking Previous State or Props with the `usePrevious` Hook

Implement a `usePrevious` React hook to easily access the previous value of any state or prop, useful for comparing current and past values in `useEffect` or other logic.

Implementing a Reliable `useInterval` Hook in React

Develop a `useInterval` React hook for safely executing a function repeatedly after a fixed delay, effectively handling `setInterval` logic within a functional component lifecycle.

Implementing Client-Side API Rate Limiting with a Throttler

Prevent overwhelming external APIs by implementing a client-side throttling mechanism using JavaScript, ensuring calls adhere to rate limits and improve integration stability.

Creating a Simple API Proxy with Node.js Express for Security and Aggregation

Set up a basic Node.js Express API proxy to secure sensitive API keys, abstract external services, and potentially aggregate multiple API responses.

Consuming Real-time API Data via WebSockets in JavaScript

Learn how to establish and manage a WebSocket connection in JavaScript to receive live, real-time updates from an API, essential for dynamic web applications.

Batching Multiple Independent API Requests with JavaScript `Promise.all`

Optimize performance by sending multiple independent API requests concurrently using JavaScript's `Promise.all`, waiting for all to complete before processing.

Regex for Validating URLs

Master URL validation in JavaScript with a comprehensive regular expression to check for correct web address formats, including protocols, domains, and paths.

Extracting Hashtags from Text using Regex

Discover how to efficiently extract all hashtags (e.g., #topic, #example) from a given string in JavaScript using a simple regular expression and `match()`. Ideal for social media apps.

Stripping HTML Tags from a String with Regex

Securely remove all HTML tags from user-provided text in JavaScript using a regular expression to prevent XSS vulnerabilities and clean content for display.

Extracting URL Query Parameters with Regex

Learn to parse and extract individual query parameters and their values from a URL string in JavaScript using a regular expression, ideal for client-side routing and data handling.