hsb.horse
Snippets
#javascript
Snippets tagged with "javascript".
- Image Extension Regex
JavaScript/TypeScript regex pattern to detect image formats from filenames. Supports png, webp, jpg, jpeg, avif, gif.
- Lazy-Initialized Object
A TypeScript pattern using getters to generate values only on first access. Lightweight lazy evaluation compared to memory caching.
- Time-Based Semantic Version Generation
A TypeScript function that automatically generates version numbers from build timestamps. Useful when version limits exist, such as in Chrome extensions.
- SHA256 Synchronous Implementation (Without WebCrypto API)
A pure JavaScript SHA256 implementation without using the WebCrypto API. For environments where the crypto object is unavailable, such as some Web Workers implementations.
- Splitting Text with TransformStream
A TypeScript example using ReadableStream and TransformStream to split long text into chunks of specified size.
- Implementing a Lightweight Result Type in TypeScript
An error handling pattern without try-catch. Type-safe error handling with a Result type that separates data and error.
- Uint32Array Helper Functions
A concise TypeScript wrapper for `new Uint32Array` calls. Supports all constructor overloads with type-safe overload definitions.
- Uint8Array Helper Functions
A TypeScript wrapper to simplify new Uint8Array calls. Supports arrays, ArrayBuffers, and length-based initialization patterns.
- Merging Uint8Arrays
A TypeScript function to merge multiple Uint8Arrays into one. Useful for combining binary data.
- Polyfill for crypto.randomUUID
A polyfill implementation of the crypto.randomUUID function. While all browsers now support this, it serves as a useful reference for understanding how UUID v4 works.
- TypeScript Array Utilities
Collection of type-safe utility functions for common array operations in TypeScript development. Empty array generation, chunking, null filtering, and shuffling.
- Dynamic Import Caching
Lightweight TypeScript implementation for caching dynamic imports. Handle multiple imports to the same path with a single Promise.