Relational selectors are used to select relationships between elements. The following are several common relational selectors:
- Descendant selectors (Descendant Selector): Select elements through their descendant relationships.
div p { color: blue; }
In the above example, all
elements located inside
- Child Selector: Select elements through their parent-child relationship.
div > p { font-weight: bold; }
In the above example, all
elements directly located inside the
- Adjacent Sibling Selector: Select elements through their adjacent sibling relationships.
h1 + p { color: red; }
In the above example, the
element immediately following the
element will be selected and the text color will be set to red.
- General Sibling Selector: Select elements through their sibling relationship.
h1 ~ p {
font-style: italic;
}
In the above example, all
elements located after the
element will be selected and the font style will be set to italic.
These relational selectors can help us select elements more accurately and apply styles based on the specific relationship between them. By rationally using relational selectors, we can flexibly control the style of elements on the page.
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