hsb.horse
Snippets
Snippets
Short code snippets and runnable notes, organized for quick reuse.
Snippet Tags- Biome npm-scripts Configuration
Common patterns for npm-scripts when setting up Biome. Run lint and format using the check command.
- 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.
- Saving man Pages to Text Files
How to save man command output to a file on macOS/Linux. Use col -b to remove control characters and create readable text.
- Download tarball from npm
How to download npm package tarballs (.tgz) using npm pack and pnpm info. Methods for npm, yarn, and pnpm.
- 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.
- TypeScript Non-null Assertion
TypeScript type guard functions to eliminate undefined and null. Ensures both runtime errors and type safety.
- 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.
- Generate parameter.json from a CloudFormation Template
A snippet that combines aws cloudformation validate-template and jq to automatically generate a parameters.json with environment variable overrides.
- How to Use CSS href Attribute Selectors
A CSS snippet using attribute selectors on the href attribute of anchor elements, including prefix match, suffix match, and substring match.
- gzip Command Cheat Sheet
A snippet covering the basic usage of the gzip command, including file compression, decompression, and option flags.
- File System API Permission Check
Function to check and request permissions for browser File System API. Supports both read-only and read-write modes.
- TypeScript Array Utilities
Collection of type-safe utility functions for common array operations in TypeScript development. Empty array generation, chunking, null filtering, and shuffling.
- React useSelection Hook
Custom React hook for managing multi-item selection state. Type-safe handling of select all, partial selection, and individual selection.
- Dynamic Import Caching
Lightweight TypeScript implementation for caching dynamic imports. Handle multiple imports to the same path with a single Promise.
- Display Storage Capacity in Finder
Toggle storage capacity display in macOS Finder with a keyboard shortcut.
- Node.js File Check
Promise-based function to check if a path is a file in Node.js. Returns false on error.
- TypeScript p-limit Implementation
TypeScript reimplementation of p-limit for controlling Promise concurrency. Achieve concurrency control without adding dependencies.
- TypeScript yocto-queue Implementation
TypeScript reimplementation of lightweight queue yocto-queue. Provides basic operations: enqueue, dequeue, iterator.
- Batch Convert Images to AVIF with avifenc
A Bash snippet that recursively scans jpg/jpeg/png files and converts them to .avif using avifenc.