The border-left property is a shorthand property for (in the following order): The CSS border-left property defines the width, line style, and color of the left border of a box. It is a shorthand property for setting the border-left-width, border-left-style, and border-left-color CSS properties.
When using the border-left property, you can provide one or all of the values (border-left-width, border-left-style, and border-left-width values) and they can be provided in any order.
You must provide a value for the border-left-style for the left border to appear.
See also the border-left-color, border-left-width properties.
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