Computation property value

[cwdoh]

error case

border-radius: 3px / 7px

li:before {
  content: "";
  display: block;
  position: absolute;
  width: 3px;
  background-color: #1da1f2;
  left: 35px;
  z-index: 1;
  border-radius: 3px / 7px
}

[cwdoh]

Done.