I\'ve used border, border-top-image, border-image and none seem to do what I am after.
border
border-top-image
border-image
I have the following CSS:
You said you wish to have no other borders, so instead of border-image-width you can also simply use the border-width shorthand :
border-image-width
border-width
see https://jsfiddle.net/j2x6n3q9/