JSFiddle - React, Tailwind, and code Playground

HTML

<div class="buttons">
    <a href="" class="active_button" data-sectionId="section1">Section 1</a>
    <a href="" data-sectionId="section2">Section 2</a>
    <a href="" data-sectionId="section3">Section 3</a>
    <a href="" data-sectionId="section4">Section 4</a>
  </div>

  <div class="sections">

    <div class="section active_section" id="section1">
      Section 1 <br/>
      Section 1 <br/>
      Section 1 <br/>
      Section 1 <br/><br/>
    </div>

     <div class="section" id="section2">
      Section 2 <br/>
      Section 2 <br/>
      Section 2 <br/>
      Section 2 <br/> <br/>
    </div>

     <div class="section" id="section3">
      Section 3 <br>
      Section 3 <br>
      Section 3 <br>
      Section 3 <br><br>
    </div>

     <div class="section" id="section4">
      Section 4 <br> 
      Section 4 <br>
      Section 4 <br>
      Section 4 <br><br>
    </div>

  </div>

CSS

body {
  text-align: center;
  padding-top: 50px;
}

a {
  color: white;
  text-decoration: none;
  padding: 10px;
  background-color: grey;
  margin: 0px -1px;
  border-radius: 10px 10px 0px 0px;
  transition: all 0.3s ease-in-out;
}

a:hover {
    background-color: lightgrey;
}

.active_button {
  background-color: lightgrey;
}

.sections {
  position: relative;
}

.section {
  display: none;
  padding: 20px;
  background-color: lightgrey;
  position: absolute;
  width: 286px;
  top: 10px;
  left: 50%;
  margin-left: -163px;
  border-radius: 0 0 10px 10px;
}

.active_section {
  display: block;
}

JavaScript

// capture click of section button
  $("a").click(function(e) {

    // prevent default link behaviour
    e.preventDefault();
      
    // find out what section button is pressed
    var sectionId = $(this).attr("data-sectionId");

     // hide the current active section 
    $(".active_section").slideUp(500, function(){
      // then take away their active class
      $(this).removeClass("active_section");
    });
      
    // slide down that section
    $("#"+sectionId).slideDown(500, function(){
      // add the active class
      $(this).addClass("active_section");
    });

  }); // click function closes here