Like border-style, but for the left border only.
default
border-left-style: none;
Removes the left border.
border-left-style: dotted;
Turns the left border into a sequence of dots.
border-left-style: dashed;
Turns the left border into a sequence of dashes.
border-left-style: solid;
Turns the left border into a solid line.
border-left-style: double;
Splits the left border into two lines.
border-left-style: groove;
Sets an inset style to the left border.