JSFiddle - React, Tailwind, and code Playground

HTML

<div class="tab">
  <button class="tablink" onclick="openCity(event, 'London')">London</button>
  <button class="tablink" onclick="openCity(event, 'Paris')">Paris</button>
  <button class="tablink" onclick="openCity(event, 'Tokyo')">Tokyo</button>
  <button class="tablink" onclick="openCity(event, 'All')">All</button>
</div>

<div id="London" class="tabcontent">
  <h3>London</h3>
  <p>London is the capital city of England.</p>
</div>

<div id="Paris" class="tabcontent">
  <h3>Paris</h3>
  <p>Paris is the capital of France.</p> 
</div>

<div id="Tokyo" class="tabcontent">
  <h3>Tokyo</h3>
  <p>Tokyo is the capital of Japan.</p>
</div>

CSS

.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
}


.tab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
  font-size: 17px;
}


.tab button:hover {
  background-color: #ddd;
}

.tab button.active {
  background-color: #ccc;
}


.tabcontent {
  display: none;
  padding: 6px 12px;
  border: 1px solid #ccc;
  border-top: none;
}

JavaScript

function openCity(e, city) {
  document.querySelectorAll('.tablink').forEach(n => {
    n.classList.toggle('active', city === 'All' || n === e.target);
  });

  document.querySelectorAll('.tabcontent').forEach(n => {
    n.style.display = city === 'All' || n.id === city ? 'block' : 'none';
  });
}

document.querySelector('.tablink').click();