JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="input"></input><button id="btn">Submit</button>
<ul id="list">
    
</ul>

JavaScript

var btn = document.getElementById("btn");
btn.addEventListener('click', function(){
    var list = document.getElementById('list');
    var entry = document.createElement('li');
    var item = document.getElementById('input').value;
    if(item === ""){
        return false;
    } else {
    
    entry.appendChild(document.createTextNode(item));
    list.appendChild(entry);
    }
});