Here is some code that I not too long ago wrote. I feel that it provides a essential explanation of combining course/ID names with pseudoclasses. A nested & selects the father or mother component in the two SASS and LESS. It isn't only for pseudo features, it can be employed https://bookmarkingquest.com/story19243066/details-fiction-and-prestashop-gtmetrix-speed-test-api-integration-module