Function _typeFlagOf

lib/css/syntax.js:1287–1288

(s)

 * @returns {"integer" | "number"} the spec type flag
 */
const _typeFlagOf = (s) =>
	s.includes(".") || s.includes("e") || s.includes("E") ? "number" : "integer";

/**
 * Leaf token node — the only `Node` subclass. `value` is the raw source slice