Function _consumeANumber

lib/css/syntax.js:507–536

(input, pos)

 * @returns {number} position just past the number
 */
const _consumeANumber = (input, pos) => {
	let cc = input.charCodeAt(pos);
	if (cc === CC_HYPHEN_MINUS || cc === CC_PLUS_SIGN) {
		pos++;
	}
	while (_isDigit(input.charCodeAt(pos))) pos++;
	if (
		input.charCodeAt(pos) === CC_FULL_STOP &&
		_isDigit(input.charCodeAt(pos + 1))
	) {
		pos++;
		while (_isDigit(input.charCodeAt(pos))) pos++;
	}
	cc = input.charCodeAt(pos);
	if (
		(cc === CC_LOWER_E || cc === CC_UPPER_E) &&
		(((input.charCodeAt(pos + 1) === CC_HYPHEN_MINUS ||
			input.charCodeAt(pos + 1) === CC_PLUS_SIGN) &&
			_isDigit(input.charCodeAt(pos + 2))) ||
			_isDigit(input.charCodeAt(pos + 1)))
	) {
		pos++;
		cc = input.charCodeAt(pos);
		if (cc === CC_PLUS_SIGN || cc === CC_HYPHEN_MINUS) {
			pos++;
		}
		while (_isDigit(input.charCodeAt(pos))) pos++;
	}
	return pos;
};

/**
 * Spec recovery: when the tokenizer realises it's mid-bad-url, consume