The border-left property

The border-left property specifies a color, type, and width for a left border. It is a shorthand property for border-left-width, border-left-style and border-left-color.

Syntax

selector {
	border-left: width type color;
}

The order of the properties does not matter.

Let's give the element a black left border with 2px width:

<div id="elem"></div>

#elem {
	border-left: 2px solid black;
	background: #f9f9f9;
	width: 300px;
	height: 100px;
}