CSS

css border bottom

.bottomBorder {
  /*           width style color  */
  border-bottom: 5px solid black;
}

border bottom css

.selector {
  border-bottom: 5px solid red;
}

What does border-bottom mean in CSS?

The border-bottom shorthand CSS property sets an element's bottom border.
It sets the values of border-bottom-width ,
border-bottom-style and border-bottom-color.