Premium
JAVASCRIPT Snippets.

Batch Update Styles and Attributes of Multiple Elements

Discover how to select multiple DOM elements using `querySelectorAll` and efficiently apply consistent style changes or update specific attributes using JavaScript loops.

Swap Position of Two Sibling DOM Elements

Learn to programmatically change the order of two direct sibling elements within their parent container using JavaScript's `insertBefore` method and conditional logic.

Vue 3 Composition API with script setup

Learn to use Vue 3's Composition API with `script setup` for reactive state (`ref`), computed properties, watchers, and lifecycle hooks (`onMounted`) in a concise way.

Vue 3 Component Communication: Props, Emits, and Slots

Master passing data with `defineProps`, emitting events with `defineEmits`, and rendering dynamic content using slots for robust Vue 3 component communication.

Global State Management with Vue 3 Provide/Inject

Implement simple global state management in Vue 3 using the Composition API's `provide` and `inject` functions for sharing reactive data across components without props drilling.

Dynamic Components and KeepAlive in Vue 3

Dynamically switch between Vue 3 components using `<component :is="..." />` and optimize performance by preserving component state with `<KeepAlive>`.

Vue Router 4: Basic Setup and Programmatic Navigation

Learn to set up Vue Router 4 for Single Page Applications, define routes with parameters, and perform programmatic navigation using `useRouter`.

Robust API Data Fetching with Async/Await in JavaScript

Learn to fetch data from REST APIs using modern JavaScript `async/await` syntax, incorporating proper error handling and abort controllers for cleaner, more resilient code.

Efficiently Stream Large API Responses in Node.js with `fetch`

Learn to process large JSON or data streams from external APIs in Node.js without excessive memory usage by using `fetch` with `ReadableStream` and `TextDecoder`.

Validate Full URL Structure with Regex

Learn to validate complete URL structures, including protocol, domain, path, and query parameters, using a powerful JavaScript regex for reliable input checks.

Enforce Strong Password Requirements with Regex

Implement strong password validation using a single regex pattern in JavaScript, ensuring passwords contain uppercase, lowercase, numbers, and special characters.

Extract All Image URLs from HTML Content

Discover how to extract all image source URLs (src attributes) from an HTML string using a regular expression in JavaScript, perfect for content parsing tasks.