HTML DOM id attribute

IDSet or return the id attribute value of an element.

The ID should be unique within the page and is usually used todocument.getElementById()The method returns the element.

Syntax:

Return the id attribute:

element.id

Set the id attribute:

element.id = id

Example

var x = document.getElementsByTagName("li")[0].id;

All browsers fully support the id attribute:

Properties
id	Is	Is	Is	Is	Is

Value	Description
id	ID of the specified element

Return Value:	A string representing the element's ID attribute
DOM Version:	DOM Level1

Change Element ID:

Example

document.getElementsByTagName("li")[0].id = "myList2";

Check if the ID of the first <div> element in the document is "myDiv":

Example

var x = document.querySelector("div");
if (x.id == "myDiv") {
　　　alert("Yes... The DIV has 'myDiv' ID");
} else {
　　　alert("False");
}

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