HTML DOM Element id
Examples
Get the id of the first anchor:
let id = document.getElementsByTagName("a")[0].id;
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Change the id of an element:
document.getElementById("demo").id = "newid";
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Change the font size of "myP":
const element = document.getElementById("myP");
element.style.fontSize = "30px";
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Definition and Usage
The id property sets or returns the value of an element's id attribute.
Note
An id should be unique within a page.
See Also
Syntax
Return the id property:
element.id
Set the id property:
element.id = id
Property Value
| Value | Description |
| id | The id of the element. |
Return Value
| Type | Description |
| String | The id of the element. |
Browser Support
element.id is supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | Yes |
