Board Thread:Support Requests - Getting Technical/@comment-27075564-20181026192522/@comment-27958705-20181028005335

Andrewds1021 #7 With the single colon, you are relying on the browser developer to be gracious and choose to treat it like a double colon. :before was first, in css2. :: notation was introduced later, in css3. it is not to browser developer to decide, it is live standard.