class InvalidStyleError extends Error { constructor(style: string, value: string, type: string) { super(`value for ${style} ${value} is invalid, please use a valid ${type}`); this.name = 'InvalidStyleError'; } } function validateHexCode(value: string): boolean { return !/^#?([\dA-Fa-f]{6}|[\dA-Fa-f]{3})$/.test(value); } function validateNumber(value: string): boolean { return !/^\d+$/.test(value); } function validateSizeInPixels(value: string): boolean { return !/^\d+px$/.test(value); } export { validateHexCode, validateNumber, validateSizeInPixels, InvalidStyleError };