JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<button name="btnUm" value="btnUm">First Paragraph</button>
<button name="btnDois" value="btnDois">Second Paragraph</button>
<button name="btnTres" value="btnTres">Yet one more Paragraph</button>

<textarea name="teste" id="" cols="30" rows="10"></textarea>

CSS

p {
    color: red;
    margin: 5px;
    cursor: pointer;
  }
  p:hover {
    background: yellow;
  }

JavaScript

$( "button[name*='btn']" ).click(function() {
  $("textarea[name='teste']").val($(this).val());
});