JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="newDeals">
<button type="button" id="add">добавь давай</button>
<ul id="blanks"></ul>

JavaScript

$("#add").click(function () {
  const text = $('#newDeals').val();
  $("#blanks").append(`<li>${text}</li>`);
});