A pure CSS technique for adding custom radio and checkbox inputs without JavaScript that has keyboard support and degrades well. Star ratings are one of those classic UX patterns that everyone has tinkered with at one time or another. I had an idea get the UX part of it done with very little. Selectors. Selectors are specify the target of styling. Selectors may range from simple element names to rich contextual representations. Kind of selector Create a pure CSS tree folder structure with collapsible folders utilising checkboxes along with the checked pseudo-class. Well organized and easy to understand Web bulding tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, and XML. Jon Cuthbert presents a simple approach to CSS class naming, building on methodologies like OOCSS, BEM, and others popular methods. Child combinator A B. The (greater than) combinator represents a strict child/parent relationship where element B is a direct child element of it's parent. A CSS selector can contain more than one simple selector. Between the simple selectors, we can include a combinator. There are four different combinators in CSS3.