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JAVASCRIPT Snippets.

Validate Strong Password Format

Implement strong password validation in JavaScript using regex, requiring minimum length, uppercase, lowercase, numbers, and special characters for enhanced security.

Extract Hashtags from Text

Efficiently extract all hashtags (e.g., #topic) from user-generated text using a JavaScript regex, ideal for social media features or content categorization.

Modify Element Attributes and CSS Styles

Discover how to programmatically change HTML element attributes such as `src` or `href`, and manipulate inline CSS styles like `color` or `fontSize` using JavaScript DOM properties.

DOM Traversal: Accessing Related Elements

Master DOM traversal by learning to navigate between parent, child, and sibling elements using properties like `parentElement`, `children`, `nextElementSibling`, and `closest()`.

Remove DOM Elements and Clear Content

Learn different techniques to remove elements from the DOM, either by targeting specific elements for removal or by efficiently clearing all child elements from a container.

Custom `useDebounce` Hook for Input Throttling

Learn to create a custom React `useDebounce` hook to delay execution of functions, perfect for search inputs, preventing excessive API calls, and improving performance.

Custom `useClickOutside` Hook for Closing Modals/Dropdowns

Implement a React `useClickOutside` hook to detect clicks outside a specified DOM element, perfect for automatically closing dropdowns, modals, or context menus.

Using `useRef` for Auto-Focusing an Input on Mount

Learn how to use the React `useRef` hook to directly interact with the DOM, enabling functionality like automatically focusing an input field when a component renders.

Optimizing Callbacks with `useCallback` to Prevent Re-renders

Discover how to use React's `useCallback` hook to memoize functions, preventing unnecessary re-renders of child components that receive callbacks as props and enhancing performance.

Custom `useWindowSize` Hook for Responsive Components

Create a custom React `useWindowSize` hook to track the current width and height of the browser window, enabling dynamic and responsive UI adjustments in your components.

Client-Side Secure File Upload to AWS S3 with Pre-signed URL

Learn how to securely upload files directly from the browser to AWS S3 using pre-signed URLs, enhancing performance and offloading server resources.

Client-Side Real-time Data Synchronization with WebSockets

Implement real-time data updates in your web application using WebSockets, enabling instant communication and live content display.