Slick.js remove blue highlight around image

For react slick on Div the solution of causing to outline is:

.slick-slide div {
  outline: none;
 }

You need to use outline: none;

Put it on .slick-slide

.slick-slide {
    outline: none
}

Demo

Try this it's work for me. You need to add outline: none; for slick slider a tag

.slick-slide {
  &:focus, a {
    outline: none;
  }
}