resizable.css

.resizable {
  outline: 1px solid transparent;
  /* prevent flickering */
  backface-visibility: hidden;
  transform: translate3d(0, 0, 0);
  word-wrap: break-word;
}

.resizable.active {
  outline: 1px dashed blue;
}

.resizable > :not(.resize-handle) {
  cursor: default;
}

.resize-handle {
  background-color: #fff;
  border: 1px solid blue;
  box-sizing: border-box;
  border-radius: 1px;
  display: none;
  height: 10px;
  position: absolute;
  width: 10px;
  z-index: 1000;
}

.resizable.active .resize-handle {
  cursor: pointer;
  display: block;
}

.resize-handle-rotate {
  border-radius: 50%;
  left: calc(50% - 5px);
  top: -25px;
}

.resize-handle-n {
  left: calc(50% - 5px);
  top: -5px;
}

.resize-handle-ne {
  right: -5px;
  top: -5px;
}

.resize-handle-e {
  right: -5px;
  top: calc(50% - 5px);
}

.resize-handle-se {
  bottom: -5px;
  right: -5px;
}

.resize-handle-s {
  bottom: -5px;
  left: calc(50% - 5px);
}

.resize-handle-sw {
  bottom: -5px;
  left: -5px;
}

.resize-handle-w {
  left: -5px;
  top: calc(50% - 5px);
}

.resize-handle-nw {
  left: -5px;
  top: -5px;
}