borderleftwidth

Border-left-width is a CSS property that sets the width of an element's left border. It is one of the longhand border properties, corresponding to the left side of the border. The shorthand border-left can set width, style, and color together.

Syntax: border-left-width: <length> | thin | medium | thick | inherit;

Value details: You can specify a length value using any CSS length unit, for example 2px, 0, 0.5em. The keywords thin, medium, and thick map to UA-defined default widths. The computed value resolves to a length. The property is not inherited by default, but it can be inherited if specified as 'inherit'.

Interaction: The width takes effect only if border-left-style is not none or hidden. If the style is none or hidden, the left border is not drawn regardless of width.

Initial value: medium.

Examples: border-left-width: 2px; border-left-width: thin;

Browser compatibility: widely supported in modern browsers.

See also: border-left, border-left-style, border-left-color.