.js-image-cropper-box{
  overflow:hidden;
  width:100%;
  position:relative;
  min-height:120px;
}

.js-image-cropper-box img{
  width:100%;
  user-select: none; 
}

.js-image-cropper-box .resizebox {
  left:0; 
  top:0;
  width:160px;
  height:90px;
  position:absolute;
  background:transparent;
  box-shadow:inset 0 0 10px #fff,0 0 1px #000;
}

.js-image-cropper-box .resizebox .resizer { width: 10px; height: 10px; background: blue; position:absolute; right: 0; bottom: 0; cursor: se-resize; }