Answer
An ID selector matches an element by its ID value. • It begins with a number sign, such as `#main`. • An ID value should be unique within an HTML document. • ID selectors have high specificity, so classes are often easier to reuse.
💡 Simple Example
#main-content {
scroll-margin-top: 5rem;
}
⚡ Quick Revision
An ID selector targets the element with a matching unique ID.