# HTML DOM id Property

Element Object

## Example

Get the id of an element:

var x = document.getElementById("myAnchor").id;

The result of x will be:

myAnchor
Try it yourself »

More "Try it Yourself" examples below.

## Definition and Usage

The id property sets or returns the id of an element (the value of an element's id attribute).

An ID should be unique within a page, and is often returned by using the document.getElementById() method.

## Syntax

Return the id property:

HTMLElementObject.id

Set the id property:

HTMLElementObject.id=id

## Property Values

Value | Description
--- | ---
id | Specifies the id of an element

## Technical Details

Return Value: | A String, representing the ID of an element

## Browser Support

Property |  |  |  |  |
--- | --- | --- | --- | --- | ---
id | Yes | Yes | Yes | Yes | Yes

## More Examples

## Example

Change the id of an element:

document.getElementById("demo").id = "newid";
Try it yourself »

## Example

If the first <div> element in the document has an id of "myDIV", change its font-size:

var x = document.getElementsByTagName("DIV")[0];
if (x.id == "myDIV") {
x.style.fontSize = "30px";
}
Try it yourself »

## Related Pages

CSS Tutorial: CSS Selectors

CSS Reference: CSS #id Selector

HTML DOM Reference: HTML DOM getElementById() Method

Element Object

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