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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.
Note: identifiers are case-sensitive, but you should avoid creating IDs that differ only in the capitalization (see Case sensitivity in class and id names).
Syntax
var idStr = elt.id; // Get the id. elt.id = idStr; // Set the id
idStris 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
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
See also
- The DOM id global attribute.