Method typeFlag

lib/css/syntax.js:1373–1395

* Spec type flag. For number / dimension tokens it's "integer" / "number" * (derived from `value`); for hash tokens it's "id" / "unrestricted" (re-derived * from the source). The two senses share the name in the spec; both are computed * on read so every leaf token keeps the same object shape

()

	 * @returns {"integer" | "number" | "id" | "unrestricted"} the spec type flag
	 */
	get typeFlag() {
		if (this.type === T_HASH) {
			// Re-derive id-ness from the source (whether the name after `#` starts an
			// ident sequence) rather than storing an `_isId` slot — keeps hash tokens
			// the same shape as every other leaf token. Matches the lexer's
			// `consumeNumberSign`, which sets `isId` from the same check.
			const input = this._locConverter._input;
			const p = this.start + 1;
			return _ifThreeCodePointsWouldStartAnIdentSequence(
				input,
				p,
				input.charCodeAt(p),
				input.charCodeAt(p + 1),
				input.charCodeAt(p + 2)
			)
				? "id"
				: "unrestricted";
		}
		const v = this.value;
		return _typeFlagOf(
			this.type === T_DIMENSION ? v.slice(0, _consumeANumber(v, 0)) : v
		);
	}

	/**
	 * @returns {"+" | "-" | ""} the spec sign (number / percentage / dimension tokens)