@thi.ng/date/internal/precision.js

Datetime types, relative dates, math, iterators, composable formatters, locales

const __precisionToID = (prec) => "yMdhmst".indexOf(prec);
const __idToPrecision = (id) => "yMdhmst".charAt(id);
export {
  __idToPrecision,
  __precisionToID
};