Selectors decide which elements that USS rules affect.
USS supports a set of simple selectors that are analogous, but not identical, to simple selectors in CSS. A simple selector matches elements by element type, USS class, element name, and wildcard.
You can combine simple selectors into complex selectors, or append pseudo-classes to them to target elements in specific states. USS supports descendant, child, and multiple complex selectors.
| Topic | 描述 |
|---|---|
| Type selectors | Match elements based on their element types. |
| Name selectors | Match elements based on the name of an element. |
| Class selectors | Match elements that have specific USS classes assigned. |
| Universal selectors | Match any element. |
| Descendant selectors | Match elements that are descendants of another element in the visual tree. |
| Child selectors | Match elements that are children of another element in the visual tree. |
| Multiple selectors | Select elements that match all the simple selectors. |
| Selectors list | Create a comma-separated list of selectors that share the same style rule. |
| Pseudo-classes | Use pseudo-classes with selectors to target elements that are in a specific state. |
| Selector precedence | Understand USS precedence when multiple USS rules target the same elements. |