| const startsWithKeywordRegexp = /^(all|not|only|print|screen)/i | |
| module.exports = function (parentMedia, childMedia) { | |
| if (!parentMedia.length && childMedia.length) return childMedia | |
| if (parentMedia.length && !childMedia.length) return parentMedia | |
| if (!parentMedia.length && !childMedia.length) return [] | |
| const media = [] | |
| parentMedia.forEach(parentItem => { | |
| const parentItemStartsWithKeyword = startsWithKeywordRegexp.test(parentItem) | |
| childMedia.forEach(childItem => { | |
| const childItemStartsWithKeyword = startsWithKeywordRegexp.test(childItem) | |
| if (parentItem !== childItem) { | |
| if (childItemStartsWithKeyword && !parentItemStartsWithKeyword) { | |
| media.push(`${childItem} and ${parentItem}`) | |
| } else { | |
| media.push(`${parentItem} and ${childItem}`) | |
| } | |
| } | |
| }) | |
| }) | |
| return media | |
| } | |