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JAVASCRIPT Snippets.

Dynamic Components with Asynchronous Loading

Render components dynamically using `<component :is>` and improve performance with `defineAsyncComponent` for lazy loading in Vue 3 applications.

Reusable Modal Component with Teleport and Slots

Build a versatile and accessible modal component in Vue 3, leveraging `Teleport` to render outside the DOM hierarchy and `slots` for flexible content.

Sanitize User Input to Prevent XSS Attacks

Learn to sanitize user-generated content on the server-side using DOMPurify in Node.js to effectively prevent Cross-Site Scripting (XSS) vulnerabilities.

Configure Secure Session Cookies with HttpOnly, Secure, and SameSite

Learn to configure secure session cookies in an Express.js application by setting HttpOnly, Secure, and SameSite attributes to enhance protection against XSS and CSRF attacks.

Implement Secure Server-Side File Uploads with Multer

Securely handle file uploads on the server in Node.js using Multer by implementing crucial validations for file types, sizes, and storing files safely outside the web root.

Implement Server-Side API Rate Limiting to Prevent Abuse

Learn to implement server-side API rate limiting in an Express.js application using `express-rate-limit` to protect against brute-force attacks and service abuse.

Graceful API Rate Limit Handling with Exponential Backoff

Implement robust API rate limit management in JavaScript using exponential backoff and `Retry-After` headers for reliable integration and fewer failed requests.

Implementing OAuth 2.0 PKCE Flow for SPAs

Securely integrate OAuth 2.0 with PKCE (Proof Key for Code Exchange) in your Single-Page Application to authorize users without exposing client secrets.

Client-Side API Response Caching with IndexedDB

Enhance web application performance and offline capabilities by caching API responses securely and persistently using the browser's IndexedDB.

Fetching Data from a REST API with Loading and Error States

Learn to perform basic GET requests using JavaScript's Fetch API, including handling loading indicators and gracefully managing potential API errors for a better user experience.

Sending JSON Data to a REST API using POST Request

Discover how to perform a POST request with the Fetch API to send JSON data to a server. This snippet covers setting headers, stringifying the body, and handling responses.

Secure API Key Authentication for Node.js Backend Requests

Learn to securely integrate third-party APIs using API key authentication in a Node.js Express application. This snippet demonstrates how to send an API key in headers with Axios.