Function getBorderWidth

packages/extension/utils/css.ts:458–489

(style: Record<string, string>)

}

function getBorderWidth(style: Record<string, string>): string | null {
  if (style.border) {
    const parsed = parseBorderShorthand(normalizeStyleValue(style.border))
    if (parsed.width) {
      return normalizeStyleValue(parsed.width)
    }
  }

  if (style['border-width']) {
    return normalizeStyleValue(style['border-width'])
  }

  const sideWidths = BORDER_SIDES.map((side) => {
    const width = style[`border-${side}-width`]
    if (width) return normalizeStyleValue(width)

    const border = style[`border-${side}`]
    if (!border) return null

    const parsed = parseBorderShorthand(normalizeStyleValue(border))
    return parsed.width ? normalizeStyleValue(parsed.width) : null
  })

  if (sideWidths.every((width): width is string => typeof width === 'string' && width.length > 0)) {
    const [first, ...rest] = sideWidths
    if (rest.every((width) => width === first)) {
      return first
    }
  }

  return null
}

function isZeroBorderWidth(value: string): boolean {
  return ZERO_BORDER_WIDTH_RE.test(normalizeStyleValue(value).toLowerCase())