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Implementing API Rate Limiting in Node.js Express

Protect your Node.js Express API from brute-force attacks and abuse by implementing effective rate limiting middleware to control request frequency.

Add, Remove, and Get Element Attributes

Master manipulating HTML element attributes using JavaScript, including setting custom data attributes, removing existing attributes, and retrieving their values dynamically.

Handle Form Submission and Input Events

Discover how to capture user input from form fields and respond to form submission events using JavaScript, preventing default browser behavior for custom validation.

Efficiently Manage CSS Classes on Multiple Elements

Discover how to efficiently add, remove, or toggle CSS classes on a collection of DOM elements using query selectors and the classList API in JavaScript.

Extract YouTube Video ID from URL

Quickly extract the unique video ID from various YouTube URL formats (watch, embed, short, youtu.be) using a robust regex pattern.

Validate 24-Hour Time Format (HH:MM or HH:MM:SS)

Validate if a string represents a valid 24-hour time (HH:MM or HH:MM:SS) using a precise regular expression for robust input checks.

Remove Emojis from a String

Cleanse user input or normalize text by efficiently removing various Unicode emojis using a comprehensive regular expression pattern.

Extract Image `src` Attributes from HTML

Efficiently parse HTML strings to extract all `src` attribute values from `<img>` tags, useful for image processing or content analysis.

Validate a Full URL Structure

Learn to validate a complete URL string, including protocol, domain, path, query, and hash, using a robust regular expression in JavaScript.

Strip All HTML Tags from a String

Safely remove all HTML tags from a string to extract plain text content, useful for sanitization or display in environments that don't render HTML.

Validate a Strong Password

Implement a robust password validation using regex, ensuring minimum length and requiring a mix of uppercase, lowercase, numbers, and special characters.

Extract All Words from a String

Learn to extract an array of words from any text string, effectively ignoring numbers, punctuation, and extra whitespace, using JavaScript regex.