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punctilio (n.): precise observance of formalities.

Pretty good at making your text pretty. The most feature-complete and reliable English typography package. punctilio transforms plain ascii into typographically correct Unicode, even across html element boundaries. Try it live at turntrout.com/punctilio.

Smart quotes · Em / en dashes · Ellipses · Math symbols · Legal symbols · Arrows · Primes · Fractions · Superscripts · Ligatures · Non-breaking spaces · html-aware · Markdown support · Bri’ish, German, and French localisation support

import { transform } from "punctilio";
 
transform(`"It's a beautiful thing, the destruction of words..." -- 1984`);
// → “It’s a beautiful thing, the destruction of words…”—1984

punctilio accepts three input formats: text, Markdown, and html. Use it as a library, a CLI, a pre-commit hook, or⁠—for a zero-friction install in any project that already runs Prettier⁠—a Prettier plugin.

npm install punctilio