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JAVASCRIPT Snippets.

Sanitize User-Generated HTML Content with DOMPurify

Protect your web application from Cross-Site Scripting (XSS) by securely sanitizing untrusted HTML input using the robust DOMPurify library in JavaScript, ensuring safe content rendering.

Extract All Email Addresses from Text

Learn how to use JavaScript regex to efficiently find and extract all valid email addresses present within any text string for data processing.

Dynamic Component Rendering with Vue 3

Discover how to dynamically switch between different components based on a condition or user interaction using Vue 3's built-in `<component :is="...">` element.

Creating Custom Directives for DOM Manipulation in Vue 3

Extend Vue 3's capabilities by building custom directives to directly manipulate the DOM, perfect for tasks like focusing inputs or applying specific styles.

Animating Element Appearances with Vue 3 Transitions

Implement smooth entry/exit animations for elements and components using Vue 3's built-in `<Transition>` component, enhancing user experience with CSS transitions.

Programmatic Navigation using Vue Router 4 in Vue 3

Learn to navigate programmatically between routes in your Vue 3 application using Vue Router's `router.push()` and `router.replace()` methods for enhanced control.

Consume a GraphQL API with JavaScript Fetch

Learn how to make a POST request to a GraphQL endpoint using the native Fetch API in JavaScript to query data, demonstrating basic data retrieval.

Build an API Proxy with Node.js and Express

Create a simple server-side proxy using Node.js and Express to securely fetch data from a third-party API, bypassing CORS issues and protecting sensitive API keys.

Handle Multiple Concurrent API Requests with Promise.allSettled

Learn to execute multiple asynchronous API requests in parallel and process all outcomes (fulfilled or rejected) using JavaScript's Promise.allSettled for robust data fetching.

Secure Express API Endpoints with Custom API Key Middleware

Implement a custom middleware in Node.js with Express to protect your API endpoints by validating an API key sent in the request header, ensuring authorized access.

Secure File Upload Validation in Node.js with Multer

Implement secure file upload validation in Node.js using Multer to check mime types, file size, and prevent malicious uploads, enhancing application security.

Securely Manage Environment Variables in Node.js Applications

Best practices for managing sensitive configuration like API keys and database credentials using environment variables in Node.js, preventing hardcoding.