What does attribute "class" do

Answer 1

The class attribute is a way for CSS and JavaScript to access multiple elements at once.

For example, with CSS:

The HTML:

<div class='bordered'>
...
</div>
<img class="bordered"...></img>

The CSS:

.bordered {
border: 1px black solid;
}

That will give both the div and the image a border.

The class attribute is also sometimes important to JavaScript.

var borderedElements = document.getElementsByClassName("bordered");
for each (elem in borderedElements) {
elem.remove();
}

That would remove all the elements with class="bordered" from the DOM.

Answer 2

Thnk you