Here is a collection of useful CSS files that I 'host' on gist for use in dash-apps

material_switch.css

.material-switch > input[type="checkbox"] {
    display: none;   
}

.material-switch > label {
    cursor: pointer;
    height: 0px;
    position: relative; 
    width: 40px;  
}

.material-switch > label::before {
    background: rgb(0, 0, 0);
    box-shadow: inset 0px 0px 10px rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    content: '';
    height: 16px;
    margin-top: -8px;
    position:absolute;
    opacity: 0.3;
    transition: all 0.4s ease-in-out;
    width: 40px;
}
.material-switch > label::after {
    background: rgb(255, 255, 255);
    border-radius: 16px;
    box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.3);
    content: '';
    height: 24px;
    left: -4px;
    margin-top: -8px;
    position: absolute;
    top: -4px;
    transition: all 0.3s ease-in-out;
    width: 24px;
}
.material-switch > input[type="checkbox"]:checked + label::before {
    background: inherit;
    opacity: 0.5;
}
.material-switch > input[type="checkbox"]:checked + label::after {
    background: inherit;
    left: 20px;
}

material_switch_simple.css

.lbl {
  position: relative;
  display: block;
  height: 20px;
  width: 44px;
  background: #898989;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lbl:after {
  position: absolute;
  left: -2px;
  top: -3px;
  display: block;
  width: 26px;
  height: 26px;
  border-radius: 100px;
  background: #fff;
  box-shadow: 0px 3px 3px rgba(0,0,0,0.05);
  content: '';
  transition: all 0.3s ease;
}

.lbl:active:after { transform: scale(1.15, 0.85); }

.cbx:checked ~ label { background: #6fbeb5; }

.cbx:checked ~ label:after {
  left: 20px;
  background: #179588;
}

.cbx:disabled ~ label {
  background: #d5d5d5;
  pointer-events: none;
}

.cbx:disabled ~ label:after { background: #bcbdbc; }

.hidden { display: none; }