Often time as you designing your web pages, you will find that many HTML elements shares the same values; group selector allows you to combine the elements which share the same style into one selector ...

By keeping selector specificity low, you can make your CSS code easier to understand and modify. Opt for simple, straightforward selectors whenever possible, avoiding overly complex or nested ...

1 Uso excesivo de identificadores Cuando se utiliza un selector de ID en CSS, denotado por # , está destinado a apuntar a un elemento único en su página web.

I recommend learning id, class name and HTML tag selectors first. The id selector matches HTML elements with the same id. It's often used when you want to locate a specific element in the Document ...

The group recently published the Last Call Working Draft of "Selectors API," which are widely used in CSS, and are patterns that match against elements in a tree structure.