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JAVASCRIPT Snippets.

Navigate the DOM Tree (Parent, Child, Sibling)

Understand how to programmatically traverse the Document Object Model (DOM) to access parent, child, and sibling elements using JavaScript properties.

Add, Remove, and Toggle CSS Classes

Learn to dynamically manage CSS classes on DOM elements, adding, removing, or toggling them to control styling and visibility with JavaScript's classList API.

Extracting Hashtags from a String

Learn how to effectively extract all hashtags (words prefixed with #) from any given text string using JavaScript regex, useful for social media apps.

Parsing Query Parameters from a URL String

Extract individual query parameters and their values from a URL string using a regex pattern, ideal for client-side routing or data extraction.

Formatting US/Canadian Phone Numbers

Standardize phone number inputs into a consistent `(XXX) XXX-XXXX` format using JavaScript regex, enhancing user experience and data consistency.

Verifying Webhook Signatures with HMAC

Secure your Node.js application's webhooks by verifying incoming request signatures using HMAC, preventing spoofing and ensuring data integrity and authenticity.

Iterating Through Cursor-Based Paginated API Results

Efficiently fetch all data from APIs employing cursor-based pagination, ensuring you retrieve every record across multiple pages with async/await.

Caching API Responses for Offline Use with IndexedDB

Enhance web application performance and offline capabilities by caching API responses in the browser's IndexedDB, reducing network requests.

Validating Email Addresses

Learn to validate email address formats using a robust regular expression in JavaScript, ensuring proper input for forms and user registration.

Validating URLs with Regex

Implement a JavaScript function to validate web URLs, checking for common protocols (http/https), domain names, and optional paths or query parameters.

Validating Strong Passwords

Implement a JavaScript function with regex to enforce strong password policies, requiring minimum length, uppercase, lowercase, numbers, and special characters.

Removing HTML Tags from a String

Learn to sanitize user-generated content or plain text by effectively stripping out all HTML tags using a simple regular expression in JavaScript.