The Ultimate
Snippet Library.

Evenly Distribute Items in a Row with Flexbox

Learn how to create a responsive group of elements that are evenly spaced and aligned across a container using various Flexbox distribution properties.

Implement API Key Authentication in Fetch Requests

Securely integrate third-party APIs by adding API keys to request headers using JavaScript's Fetch API, ensuring authorized data access and protecting your application.

Send JSON Data with a POST Request using Fetch

Learn to make POST requests with JSON payloads to web APIs using the modern Fetch API in JavaScript, essential for creating or updating resources on a server.

Implement Robust Error Handling for Fetch API Calls

Enhance API call reliability by implementing comprehensive error handling with JavaScript's Fetch API, checking response status and parsing API-specific error bodies.

Upload Files to an API with FormData

Efficiently upload files (images, documents) to a web API using JavaScript's FormData interface and the Fetch API, suitable for file submission forms.

Poll an API for Real-time Status Updates

Implement client-side polling to periodically fetch status updates from an API, useful for long-running tasks or displaying real-time data on a web page.

Read and Modify Data Attributes in JavaScript

Explore how to access and update custom data attributes (`data-*`) on HTML elements using JavaScript, enabling you to store and retrieve element-specific information.

Optimize Performance with useCallback for Event Handlers

Learn how to use React's `useCallback` hook to memoize event handler functions, preventing unnecessary re-renders of child components when props change.

Access and Interact with DOM Elements using useRef

Discover how to use React's `useRef` hook to directly access and manipulate DOM elements, such as focusing an input field or interacting with media players.

Create a useDebounce Custom Hook for Input Values

Implement a custom `useDebounce` hook to delay updating a value until a certain time has passed, ideal for search inputs or expensive calculations.

Synchronize State with Local Storage using useLocalStorage

Create a `useLocalStorage` custom hook to effortlessly persist and retrieve component state from the browser's local storage, ensuring data persists across sessions.

Upserting Records with PostgreSQL's ON CONFLICT

Efficiently insert new records or update existing ones in PostgreSQL. Utilize INSERT ... ON CONFLICT DO UPDATE to prevent duplicate key errors and maintain data integrity, a must for web apps.