Function parseUnit

packages/core/css/parser.ts:174–185

(text: string, start = 0)

const unitRegEx = /\s*([+\-]?(?:\d+\.\d+|\d+|\.\d+)(?:[eE][+\-]?\d+)?)([a-zA-Z]+|%)?\s*/gy;
export function parseUnit(text: string, start = 0): Parsed<Unit<string>> {
	unitRegEx.lastIndex = start;
	const result = unitRegEx.exec(text);
	if (!result) {
		return null;
	}
	const end = unitRegEx.lastIndex;
	const value = parseFloat(result[1]);
	const unit = <any>result[2] || 'dip';

	return { start, end, value: { value, unit } };
}

export function parsePercentageOrLength(text: string, start = 0): Parsed<LengthPercentage> {
	const unitResult = parseUnit(text, start);