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React Hook: usePrevious for Tracking Value History

The `usePrevious` custom React hook provides a way to access the previous value of a state or prop, which is invaluable for comparing current and past states.

React Hook: useLocalStorage for Persisting State

A `useLocalStorage` custom hook for React that automatically synchronizes component state with the browser's localStorage, ensuring data persistence across sessions.

React Hook: useReducer for Complex State Logic

Leverage `useReducer` in React for managing complex state transitions, providing a robust and scalable alternative to `useState` for intricate component state.

Validate Strong Password Policy (Min 8 Chars, Mixed Case, Digit, Special)

Implement a strong password validation using a single JavaScript regex to enforce minimum length, uppercase, lowercase, numbers, and special characters.

Sanitize Input: Allow Only Alphanumeric, Spaces, and Basic Punctuation

Clean user input by removing all characters except alphanumeric ones, spaces, and common punctuation marks using a simple JavaScript regex replacement.

Extract All Data Attributes from an HTML Tag String

Learn to efficiently extract all `data-*` attributes and their values from an HTML tag string using a powerful JavaScript regex pattern for dynamic content processing.

Create a `useDebounce` Custom Hook in React

Learn to build a `useDebounce` custom React hook to delay executing a function until after a certain time, preventing excessive re-renders or API calls.

Safe `useLayoutEffect` for SSR/CSR with `useIsomorphicLayoutEffect`

Learn to use `useIsomorphicLayoutEffect`, a custom hook that conditionally uses `useLayoutEffect` or `useEffect` to safely handle DOM measurements in both client-side and server-side rendering.

Perform Asynchronous Data Fetching with `useEffect` and `useState`

Master the fundamental React pattern for fetching asynchronous data using `useEffect` and `useState` hooks, including handling loading states and errors.

Deep Watching Reactive Objects in Vue 3 `watch`

Learn to effectively monitor nested changes within reactive objects in Vue 3 using the `watch` function with the `deep` option in the Composition API.

Creating Flexible Components with Vue 3 Scoped Slots

Master Vue 3 scoped slots to build highly reusable components that allow parent components to customize and render content with child data.

Simple URL Validation with Regex

A concise JavaScript regex pattern to validate common URL formats, ensuring the presence of a protocol (http/https/ftp) and a basic valid domain structure.