IPhone Toggle Switch

<span class="toggle-switch">
  <span class="toggle-knob"></span>
</span>

.toggle-switch, .toggle-switch .toggle-knob {
    -moz-transition: all 0.2s ease-in;
    -webkit-transition: all 0.2s ease-in;
    -o-transition: all 0.2s ease-in;
    transition: all 0.2s ease-in;
}

.toggle-switch {
    height: 30px;
    width: 55px;
    display: inline-block;
    background-color: #ffffff;
    margin: 2px;
    margin-bottom: 5px;
    border-radius: 30px;
    cursor: pointer;
    border: solid 1px #d2d6de;
    box-shadow: inset 1px 1px 9px -3px rgba(4, 4, 4, 0.08), 1px 2px 6px -2px rgba(0, 0, 0, 0.01);
}

.toggle-switch .toggle-knob {
    width: 28px;
    height: 26px;
    display: inline-block;
    background-color: #ffffff;
    border: solid 1px rgba(126, 126, 126, 0.07);
    box-shadow: 0 1px 3px rgba(107, 106, 106, 0.26), 0 5px 1px rgba(107, 106, 106, 0.13);
    border-radius: 26px;
    margin: 1px 1px;
}

.toggle-switch.active {
    background-color: #77e189;
    border: solid 1px transparent;
}

.toggle-switch.active .toggle-knob {
    margin-left: 24px;
}

let toggler = document.querySelector('.toggle-switch');

toggler.onclick = function(){
  toggler.classList.toggle('active');
}