How does CSS :not selector work?

The :not pseudo selector is useful for styling a group of elements, while leaving the last (or specified) element unstyled.

li:not(:last-child) specifies that the styles should apply to all li elements except the :last-child.

Code Sample:

HTML

<ul class="css-not-selector-shortcut">
  <li>One</li>
  <li>Two</li>
  <li>Three</li>
  <li>Four</li>
</ul>

CSS

.css-not-selector-shortcut {
  display: flex;
}

ul {
  padding-left: 0;
}

li {
  list-style-type: none;
  margin: 0;
  padding: 0 0.75rem;
}

li:not(:last-child) {
  border-right: 2px solid #d2d5e4;
}

Output

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Happy Coding!