An object describing widths of HTMLElement borders.
HTMLElement
bottom: number
module:utils/dom/getborderwidths~BorderWidths#bottom
left: number
module:utils/dom/getborderwidths~BorderWidths#left
right: number
module:utils/dom/getborderwidths~BorderWidths#right
top: number
module:utils/dom/getborderwidths~BorderWidths#top