JSFiddle - React, Tailwind, and code Playground

HTML

<textarea style="width:500px; height: 150px;" id="text">This is some text</textarea>
<br />
<input type="button" value="Click Me" id="button" />
<input type="button" value="Click Me 2" id="button2" />

<br /><br />

<textarea style="width:500px; height: 150px;" id="text">This is some text</textarea>
<br />
<input type="button" value="Click Me" id="button" />
<input type="button" value="Click Me 2" id="button2" />

JavaScript

$(function () {
    $('#button').on('click', function () {
        var text = $('#text');
        text.val(text.val() + "\n\nafter clicking");    
    });
    $('#button2').on('click', function () {
        var text = $('#text');
        text.val(text.val() + "\n\nafter clicking 2");    
    });
});