JSFiddle - React, Tailwind, and code Playground

HTML

<div class="onoffswitch">
  <input type="checkbox" name="onoffswitch" class="onoffswitch-checkbox" id="myonoffswitch" checked>
  <label class="onoffswitch-label" for="myonoffswitch">
          <span class="onoffswitch-inner"></span>
          <span class="onoffswitch-switch"></span>
      </label>
</div>

<div class="triggeredDiv">
  Hello World
</div>

CSS

.onoffswitch {
  position: relative;
  width: 90px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.onoffswitch-label {
  display: block;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid #999999;
  border-radius: 20px;
}

.onoffswitch-inner:before,
.onoffswitch-inner:after {
  display: block;
  float: left;
  width: 50%;
  height: 30px;
  padding: 0;
  line-height: 30px;
  font-size: 14px;
  color: white;
  font-family: Trebuchet, Arial, sans-serif;
  font-weight: bold;
  box-sizing: border-box;
}

.onoffswitch-switch {
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
}

.onoffswitch-checkbox:checked+.onoffswitch-label .onoffswitch-switch {
  right: 0px;
}

.onoffswitch-switch {
  display: block;
  width: 18px;
  margin: 6px;
  background: #FFFFFF;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 56px;
  border: 2px solid #999999;
  border-radius: 20px;
  transition: all 0.3s ease-in 0s;
}

.onoffswitch-label:before,
.onoffswitch-switch {
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
}

input[type="radio"],
input[type="checkbox"] {
  margin: 3px 0 0;
}

input[type="radio"],
input[type="checkbox"] {
  margin: 4px 0 0;
  margin-top: 1px \9;
  line-height: normal;
}

input[type="checkbox"],
input[type="radio"] {
  box-sizing: border-box;
  padding: 0;
}

.onoffswitch-checkbox {
  display: none;
}

.onoffswitch-inner:before {
  content: "ON";
  padding-left: 10px;
  background-color: #34A7C1;
  color: #FFFFFF;
}

.onoffswitch-inner:after {
  content: "OFF";
  padding-right: 10px;
  background-color: #EEEEEE;
  color: #999999;
  text-align: right;
}

.onoffswitch-inner {
  display: block;
  width: 200%;
  margin-left: -100%;
  transition: margin 0.3s ease-in 0s;
}

.onoffswitch-checkbox:checked+.onoffswitch-label .onoffswitch-inner {
  margin-left: 0;
}

.triggeredDiv {
  display: block;
}

.triggeredDiv.hidden {
  display:...

JavaScript

function toggleDiv() {
  if (document.getElementById('myonoffswitch').checked) {
    document.querySelector('.triggeredDiv').classList.remove('hidden');
  } else {
    document.querySelector('.triggeredDiv').classList.add('hidden');
  }
}
document.getElementById('myonoffswitch').addEventListener("change", toggleDiv);