commerce/lib/spree/utils/validations/validate-images-size.ts

const validateImagesSize = (size: unknown): string => {
  if (typeof size !== 'string') {
    throw new TypeError('size must be a string.');
  }

  if (!size.includes('x') || size.split('x').length != 2) {
    throw new Error("size must have two numbers separated with an 'x'");
  }

  return size;
};

export default validateImagesSize;