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JAVASCRIPT Snippets.

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

JAVASCRIPT

React `useIntersectionObserver` for Element Visibility Detection

Implement lazy loading and infinite scrolling efficiently with `useIntersectionObserver`, a React hook that detects when a target element enters or exits the viewport.

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JAVASCRIPT

React `useEventCallback` for Stable Callbacks in `useEffect`

Create stable callback functions that can be safely used in `useEffect` dependency arrays without causing unnecessary re-renders or stale closures, improving component performance and reliability.

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JAVASCRIPT

React `useWhyDidYouUpdate` for Debugging Re-renders

Identify and debug unnecessary React component re-renders by logging changes in props or state using the `useWhyDidYouUpdate` hook, helping optimize application performance.

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JAVASCRIPT

React `useOnlineStatus` Hook for Network Connectivity Detection

A custom React hook to detect and manage the user's online or offline network connectivity status, enabling adaptive UI/UX based on network availability for better user experience.

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JAVASCRIPT

React `useColorScheme` Hook for Dark Mode Detection

Implement a custom React hook to detect the user's preferred color scheme (light or dark mode) using CSS `prefers-color-scheme` media query for dynamic theming.

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JAVASCRIPT

React `useScrollPosition` Hook to Track Scroll Position

A reusable React hook that monitors and provides the current vertical and horizontal scroll position of the window or a specified DOM element in real-time, useful for animations.

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JAVASCRIPT

React `useAsync` Hook for Managing Asynchronous Operations

A versatile React hook to manage the state (loading, error, data) of any asynchronous operation, simplifying data fetching and promise handling in components.

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JAVASCRIPT

Robust API Retries with Exponential Backoff

Implement a resilient API retry mechanism using exponential backoff in JavaScript to handle transient network issues or server-side errors gracefully, improving application stability.

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JAVASCRIPT

Polling API for Asynchronous Job Status

Learn to effectively poll an API endpoint in JavaScript to check the status of a long-running asynchronous job, ensuring timely updates without blocking the UI.

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JAVASCRIPT

Uploading Files to API with FormData in JavaScript

Discover how to efficiently upload files to a backend API using JavaScript's `FormData` object with the `fetch` API, enabling seamless file transfers in web applications.

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JAVASCRIPT

Cancelling Fetch Requests with AbortController

Improve user experience and prevent race conditions by learning to cancel pending `fetch` API requests using `AbortController` in JavaScript, especially useful for search or navigation.

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JAVASCRIPT

Generic API Client Wrapper for Fetch API

Create a reusable and robust API client wrapper using JavaScript's `fetch` API, centralizing common configurations like base URLs, headers, and error handling for cleaner code.

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