CSS select an element that contains specific classes only

Question

For example:

<div id="element1" class="c1 c2 c3"></div>
<div id="element2" class="c1 c2 c3 b1"></div>

Is there any CSS selector that will allow me to select elements that contain only and exactly classes c1, c2 and c3.

So I want to be able to get element1 but not element2, and I'm not using the ID because thats actually the same on every page, but I want to be able to find when the div has only those classes and nothing else.

Thanks!

Answer 1

Use Attribute Selectors

[class="c1 c2 c3"] {
    color: red;
}

<div id="element1" class="c1 c2 c3">Item 1</div>
<div id="element2" class="c1 c2 c3 b1">Item 2</div>