@ewanc26/utils

@ewanc26/utils is a zero-dependency TypeScript utility library extracted from ewancroft.uk. It provides helpers for date and number formatting, URL manipulation, input validation, locale detection, and RSS feed generation. Part of the @ewanc26/pkgs monorepo. Installation Modules Date & Locale formatRelativeTime returns relative strings (Xm ago, Xh ago, Xd ago) for recent dates, falling back to a localised short date beyond 7 days. Number Formatting Both functions accept an optional locale string; otherwise they use navigator.language with an en-GB fallback. URL Utilities Validators & Text Helpers RSS Generation createRSSResponse returns a Response with Content-Type: application/rss+xml; charset=utf-8 and a configurable Cache-Control header (default: 1 hour). Lower-level helpers — escapeXml, escapeXmlAttribute, normalizeCharacters, formatRSSDate, generateRSSItem — are also exported if you need to build feeds manually. SSR Compatibility All functions are SSR-safe. Functions that need navigator.language or window check for their availability and fall back to en-GB / sensible defaults on the server. Tech Stack TypeScript 5.9+. No runtime dependencies. Compiled to ESM with tsc. Licence AGPL-3.0-only — see the pkgs monorepo.