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JAVASCRIPT Snippets.

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.

Create a Reusable useToggle Composable for Vue 3

Implement a `useToggle` composable in Vue 3's Composition API to easily manage boolean state, enhancing code reusability and simplifying component logic.

Build a Reusable Modal Component with Vue 3 Slots

Create a highly flexible and reusable modal component in Vue 3 using named and scoped slots, allowing dynamic content injection for headers, bodies, and footers.

Manage Global Event Listeners with Vue 3 Lifecycle Hooks

Learn to effectively add and remove global event listeners in Vue 3 using `onMounted` and `onUnmounted` hooks, ensuring proper resource management and preventing memory leaks.

Deep Data Passing with Provide/Inject in Vue 3

Master `provide` and `inject` in Vue 3 to effortlessly pass data down through deeply nested components without prop drilling, maintaining clean component interfaces.

Validate URL Format with Regular Expression

Use a JavaScript regular expression to accurately validate URLs, checking for common protocols and domain structures in web applications.