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Code Snippets
Small, reusable JavaScript snippets for common conversions, browser APIs, closures, typed arrays, UUIDs, and file handling.
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JavaScript Closure Inside Loops
Learn how JavaScript closures behave inside loops, why var causes repeated values, and how let, helper functions, and iteration methods solve the problem.
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File Uploads in JavaScript: Guide to the Fetch API
A complete guide to uploading files in JavaScript using the Fetch API and FormData. Learn best practices, see a full code example with progress bar, and understand error handling.
Read moreJavaScript Typed Arrays: Uint8Array, Uint16Array, and Uint32Array
Learn about JavaScript Uint8Array, Uint16Array, and Uint32Array, their use cases in handling binary data efficiently, and why understanding them is relevant for website performance optimization.
Read moreConvert a String to Boolean in JavaScript
Learn how to convert a string like true or false into a boolean in JavaScript. Explore best practices, pitfalls, and multiple methods to handle string-to-boolean conversion safely.
Read moreGenerate a UUID in JavaScript Without a Library
Generate a secure UUID v4 in JavaScript with crypto.randomUUID(), plus a Web Crypto fallback for supported browsers and Node.js—no external library required.
Read moreConvert a String to Uint8Array in JavaScript (and Back)
Convert a JavaScript string to Uint8Array with TextEncoder and decode it with TextDecoder. Includes Unicode-safe browser and Node.js examples.
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