JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="select">{{value}}
  <ul class="options">
  <li class="options-heading"><b>Options Heading</b></li>
  
    {{#each options}}
    <li>{{value}}</li>
    {{/each}}
    
      <li>Some Options</li>
  
  </ul>
</ul>

CSS

body {font-family:Arial;font-size:11px;}

.select {
  min-height:15px;
  cursor:pointer;
  list-style-type: none;
  width:100%;
  border:1px solid rgba(5,0,0,0.1);
  padding:0px;
  margin:0;
  text-align:center;
  border-radius:5px;
  margin-top:5px;
  margin-bottom:5px}
.select li {
  padding:5px;
  background:white;
  border-bottom:1px solid rgba(5,0,0,0.1);
  width:100%;
  list-style-type: none;
  max-width:200px;}
.options {
  overflow-y:auto;
  height:200px;
  position:absolute;
  width:100%;
  margin:0;
  padding:0px;
  display:none;
  background:rgba(5,0,0,0.4);
  color:black;}
.option:hover, .activeselect {
  background: #0183DA;
  color:white}
.showblock {display:block;}
.options-heading {
  background:white;
  color:black;
  cursor:auto;
  text-transform:uppercase}
.options-expand {
  position:fixed;width:100%;
  height:100vh;
  top:0;
  left:0;
  display: flex;
  display: -webkit-flex;
  -webkit-flex-direction: column;
  flex-direction: column;
  align-items:center;
  -webkit-justify-content: center;
  justify-content:center;}

JavaScript

$( document ).ready(function() {
  
	$( ".select" ).click(function(event) {
				
    if($(event.currentTarget).hasClass("activeselect")) {
    $(event.currentTarget).children(".options").removeClass("showblock")
    $(event.currentTarget).removeClass("activeselect")
	$(event.currentTarget).children(".options").removeClass("options-expand");
    } else {    
   
    $(event.currentTarget).addClass("activeselect")
    $(event.currentTarget).children(".options").addClass("showblock")
	$(event.currentTarget).children(".options").addClass("options-expand");
    }
	
  
  });
  
});