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JAVASCRIPT Snippets.

Efficient API Polling for Real-time Data Updates

Implement effective API polling to regularly fetch and update data in your web application, complete with proper cleanup to prevent memory leaks and ensure optimal performance.

Cancelling In-Flight API Requests with AbortController

Learn how to effectively cancel pending `fetch` API requests using `AbortController` in JavaScript, preventing race conditions and optimizing resource usage in dynamic web applications.

Throttling & Debouncing API Requests for Performance

Optimize web application performance by implementing client-side throttling and debouncing techniques to control the frequency of API calls, preventing overload and improving user experience.

Extracting a Specific Query Parameter from URL

A JavaScript regex function to easily extract the value of a named query parameter from a given URL string, useful for front-end routing.

Removing Basic HTML Tags from a String

A JavaScript regex snippet to strip simple HTML tags from a string, useful for converting rich text to plain text or basic content sanitization.

Basic International Phone Number Validation

A JavaScript regex for validating common international phone number formats, supporting country codes and various separators, ideal for forms.

Extracting All Links and HREFs from HTML String

A JavaScript regex solution to parse an HTML string and extract all anchor (<a>) tags along with their href attributes, useful for web scraping or content analysis.

Syncing State with URL Query Params using useEffect

Learn how to synchronize React component state with URL query parameters. This snippet uses useEffect to read and update the URL, making component state bookmarkable and shareable.

Optimizing Performance with useMemo for Expensive Computations

Optimize your React components by memoizing expensive calculations using the `useMemo` hook. Prevent unnecessary re-renders and improve performance for computationally intensive tasks.

Advanced State Management with useReducer Hook

Learn to manage complex application state more predictably with React's `useReducer` hook. This snippet illustrates building a simple shopping cart with multiple actions (add, remove, update quantity).

Global Theme Management with useContext and Custom Hook

Implement a global theme switcher in React using `createContext` and `useContext`. This snippet shows how to create a custom `useTheme` hook for easy theme access and toggling across components.

Programmatic Media Control with useRef Hook

Learn to programmatically control HTML5 media elements like `<video>` or `<audio>` in React using the `useRef` hook. This snippet demonstrates playing, pausing, and resetting a video.