toggle-switch knockout component

ko.components.register.js

ko.components.register('toggle-switch', {
        viewModel: function (params) {
            this.checked = params.checked;
        },
        template: '<label class="switch">' +
                  '<input type="checkbox" data-bind="checked: checked" />' +
                  '<span class="slider round"></span></label>'
    });

snippet.html

<div class="form-group">
   <label>Turn on / off</label><br />
   <toggle-switch params="checked: onOff"></toggle-switch>
</div>

style.css

/* The switch - the box around the slider */
label.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

/* Hide default HTML checkbox */
label.switch input {display:none;}

/* The slider */
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    -moz-transition: .4s;
    -o-transition: .4s;
    transition: .4s;
}

    .slider:before {
        position: absolute;
        content: "";
        height: 26px;
        width: 26px;
        left: 4px;
        bottom: 4px;
        background-color: white;
        -webkit-transition: .4s;
        -moz-transition: .4s;
        -o-transition: .4s;
        transition: .4s;
    }

input:checked + .slider {
  background-color: #2196F3;
}

input:focus + .slider {
    -moz-box-shadow: 0 0 1px #2196F3;
    -webkit-box-shadow: 0 0 1px #2196F3;
    box-shadow: 0 0 1px #2196F3;
}

input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    -moz-transform: translateX(26px);
    -o-transform: translateX(26px);
    transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
    -moz-border-radius: 34px;
    -webkit-border-radius: 34px;
    border-radius: 34px;
}

    .slider.round:before {
        -moz-border-radius: 50%;
        -webkit-border-radius: 50%;
        border-radius: 50%;
    }