element.id

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

It must be unique in a document, and is often used to retrieve the element using getElementById. Other common usages of id include using the 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

Specification	Status	Comment
DOM The definition of 'id' in that specification.	Living Standard	No change from Document Object Model (DOM) Level 2 HTML Specification.
Document Object Model (DOM) Level 2 HTML Specification The definition of 'id' in that specification.	Recommendation	No change from Document Object Model (DOM) Level 1 Specification.
Document Object Model (DOM) Level 1 Specification The definition of 'id' in that specification.	Recommendation	Initial definition.

Browser compatibility

See also

• The DOM id global attribute.