Pseudo-class :not

The :not pseudo-class represents an element that is not represented by its argument.

Syntax

selector:not(){ properties }

The following selector matches all p elements in an HTML document that are not "#example"(value of id attribute):

[style.css]

 p:not(#example){
   background-color: yellow;
 }

[index.html]

<body>
  <h1>:not example</h1>
  <p>This is a paragraph.</p>
  <p id="example">This is a paragraph.</p>
  <p>This is a paragraph.</p>
</body>

The following selector matches all input elements in an HTML document that are not disabled:

[style.css]

 input:not([DISABLED]){
   background-color: yellow;
 }

[index.html]

<body>
<form>
  Phone: <input type="tel"><br>
  E-mail: <input type="email" disabled="disabled">
</form>
</body>

CSS defines the :not pseudo-class selector in 6.6.7. The negation pseudo-class.