Element: id property

The id property of the Element interface reflects the element's id content attribute.

If the id value is not the empty string, it must be unique in a document.

The id is often used with getElementById() to retrieve a particular element. Another common case is to use an element's ID as a selector when styling the document with CSS.

NOTE: Identifiers are case-sensitive, but you should avoid creating IDs that differ only in the capitalization.

Value

A string.

Specifications

Browser compatibility

See also

• The DOM id global attribute.