element.id

The Element.id property represents the element's identifier, reflecting the id global 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.

Syntax

var idStr = elt.id; // Get the id.
elt.id = idStr; // Set the id

• idStr is the identifier of the element.

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also

• The DOM id global attribute.