HTML ID
The id attribute specifies a unique id for an HTML element. The value of the id attribute must be unique within the HTML document.
The id attribute is used to point to a specific style declaration in a style sheet. It is also used by JavaScript to access and manipulate the element with the specific id.
HTML ID is unique. Multiple ID's are not accessible or allowed.
Example
<!DOCTYPE html>
<html lang="en">
<head>
<title>Document</title>
<style>
#myId {
background-color : lightgray;
color : white;
word-wrap : wrap;
align-item : center;
}
</style>
</head>
<body>
<div id="myId">Lorem ipsum dolor sit amet consectetur, adipisicing elit. Perspiciatis iusto, ad autem, quas consequuntur, architecto molestias saepe laborum perferendis corrupti amet beatae assumenda?</div>
</body>
</html>
Lorem ipsum dolor sit, amet consectetur adipisicing elit. Possimus hic fugiat quasi ea aspernatur dolor reiciendis rem nulla at eius. Perferendis, minima ipsam.