@slate-editor/image-plugin/dist/ImageEditLayer.css

SlateJS image node plugin.

.image-node--container .image-node--image-edit-layer,
.image-node--container .image-node--image-edit-layer:active,
.image-node--container .image-node--image-edit-layer:focus {
  display: none;
  justify-content: center;
  align-items: center;
  content: '';
  width: 100%;
  height: calc(100% - 6px);
  position: absolute;
  left: 0;
  top: 0;
  background-color: rgba(255,255,255,.5);
  z-index: 10;
  cursor: pointer;
  outline: 3px solid #1f78d8;
  box-shadow: 0 0 12px #1f78d8;
}
.image-node--container .image-node--image-edit-layer .image-node--image-edit-button {
  z-index: 11;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.9);
  border-radius: 3px;
  border: none;
  font-size: 12px;
  padding: 7px 10px;
  text-align: center;
  cursor: pointer;
  position: relative;
  z-index: 11;
  line-height: 1;
}
.image-node--container .image-node--image-edit-layer .image-node--image-edit-text {
  color: #000;
  font-size: 14px;
  padding: 7px 10px;
  text-align: center;
  position: relative;
  line-height: 1;
  font-weight: 600;
}

.image-node--container:not(.readonly):hover .image-node--image-edit-layer,
.image-node--container:not(.readonly):hover .image-node--image-edit-button {
  display: flex;
}

.image-node--container.readonly .image-node--image-edit-button {
  display: none;
}