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JAVASCRIPT Snippets.

Respond to CSS Media Queries with useMediaQuery Hook

Create a React hook to dynamically detect and respond to CSS media queries within your component logic, enabling responsive behavior directly in JavaScript.

Dynamically Switching Components with Vue 3

Discover how to dynamically render different components in Vue 3 using the `<component :is>` attribute, enhancing UI flexibility and code organization.

Building a Custom Directive for Element Focus

Create a custom Vue 3 directive to automatically focus input elements on mount, demonstrating how to encapsulate reusable DOM behavior efficiently.

Implementing Dependency Injection with Provide/Inject

Implement Vue 3's `provide` and `inject` to manage shared data across deeply nested components, avoiding prop drilling and improving maintainability.

Secure Server-Side CORS Configuration in Node.js Express

Properly configure Cross-Origin Resource Sharing (CORS) in your Node.js Express application to control which domains can safely access your API resources.

Securely Hash Passwords with Argon2 in Node.js

Learn to securely hash user passwords using the Argon2 algorithm with Node.js `argon2` library, preventing common brute-force and rainbow table attacks.

Preventing Server-Side Request Forgery (SSRF) Attacks

Safeguard your server-side applications from SSRF attacks by validating and restricting outbound requests to external resources and private networks.

Validate Hexadecimal Color Code Format

Use a JavaScript regex to validate hexadecimal color codes, supporting 3-digit and 6-digit formats, with or without a leading hash symbol, for CSS or UI inputs.

Parse URL Query String Parameters

Extract and parse all query parameters from a URL string into a JavaScript object, simplifying access to data passed via the URL for client-side logic.

Toggle a CSS Class on an Element

Discover the simplest way to add or remove a CSS class from any HTML element using JavaScript's `classList.toggle()`, perfect for interactive UI elements.

Smooth Scroll to an Element or Position

Implement smooth scrolling to any HTML element or specific vertical position on a webpage using the native `scrollIntoView` or `scrollTo` methods with behavior options.

Getting and Setting Custom Data Attributes

Learn to effectively store and retrieve small custom data values directly on HTML elements using `dataset` for enhanced interactivity and state management.