#viewDiv {
    border: 3px solid blue;
    margin: 10px;
    min-height: 350px;
}

.esri-expand .esri-expand__content {
    box-shadow: none;
  }

  .esri-view-width-xsmall .esri-expand--auto .esri-expand__container--expanded {
    max-height: 35%;
    width: 50%;
    top: 100px;
}

.esri-icon-non-visible::before {
    content: "\e610";   
}
.esri-icon-visible::before {   
    content: "\e611";   }