Answer
The `:nth-child()` pseudo-class matches elements by their position among siblings. • Its counting includes every element sibling unless an `of` selector filters the list. • It accepts keywords, numbers, or An+B formulas. • The match depends on sibling order in the document.
💡 Simple Example
li:nth-child(odd) {
background: #f2f2f2;
}
⚡ Quick Revision
`nth-child()` counts an element’s position among its siblings.