JSFiddle - React, Tailwind, and code Playground

HTML

<button id="somebutton">Populte Field</button>

</button>

<li id="fo14li3" class="notranslate       focused">
	<label class="desc" id="title3" for="Field3">
		Some Stuff to test
			</label>
	<div>
		<input id="Field3" name="Field3" type="text" class="field text medium" value="" maxlength="255" tabindex="2" onkeyup="handleInput(this); " onchange="handleInput(this);">
			</div>
	</li>

JavaScript

$('#somebutton').click(function() {
  $('#Field3').val("somethinggg");
});