Premium
JAVASCRIPT Snippets.

Vue 3 Reusable Client-Side Form Validation Composable

Build a custom Vue 3 composable to encapsulate and reuse client-side form input validation logic, enhancing component modularity and reusability.

Vue 3 Global Error Handling with onErrorCaptured

Catch and handle errors from child components or their lifecycle hooks in Vue 3 using the `onErrorCaptured` hook, creating robust error boundaries.

Vue 3 Custom Directive for Automatic Input Focus

Create a custom Vue 3 directive to automatically focus an input element when a component mounts, improving user experience in forms or dynamic content.

Removing a Specific DOM Element

Discover how to effectively remove an HTML element from the Document Object Model (DOM) using JavaScript's element.remove() method, cleaning up or updating your page's structure.

Toggling CSS Classes on a DOM Element

Master how to add, remove, or toggle CSS classes on an HTML element using the classList API, enabling dynamic styling changes based on user interaction or application state.

Directly Modifying Inline CSS Styles

Understand how to programmatically change an element's inline CSS properties using JavaScript, offering precise and immediate control over its visual presentation and layout.

Tracking Previous State or Prop Values with usePrevious

Discover how to create a React `usePrevious` hook to easily store and access the previous value of any state or prop, enabling advanced change detection logic.

Generic useAsync Hook for Managing Asynchronous Operations

Develop a flexible React `useAsync` hook to manage the lifecycle of any promise-based asynchronous operation, handling loading, success, and error states gracefully.

Consuming REST APIs with JavaScript Fetch (GET & POST)

Learn to make asynchronous GET and POST requests to RESTful APIs using JavaScript's native `fetch` API for robust web integrations and data handling.

Robust API Retries with Exponential Backoff in JavaScript

Implement a resilient API integration pattern using exponential backoff to handle rate limits and transient network errors gracefully in JavaScript.

Uploading Files to an API using FormData in JavaScript

Discover how to programmatically send file uploads along with other form data to a REST API using JavaScript's `FormData` object with the `fetch` API.

Preventing SQL Injection with Parameterized Queries in Node.js (PostgreSQL)

Protect your Node.js applications from SQL injection attacks by using prepared statements and parameterized queries for safe database interactions with PostgreSQL.