JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.8.2/chosen.jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.8.2/chosen.css">
<form method="post" name="form_eintrag">
	<label for="eintrag">Einträge *</label>
		<select name="eintrag" id="eintrag" data-placeholder="Bitte wählen..." class="chosen-select" required="">
			<option value=""></option>
			<option value="1">Ich bin Nummer 1</option>
			<option value="2">Ich bin Nummer 2</option>
			<option value="3">Ich bin Nummer 3</option>
	</select>
	<input type="submit" name="abschicken" value="Abschicken" id="btn_eintrag">
</form>

JavaScript

$("#eintrag").chosen({
		    disable_search_threshold: 10,
		    no_results_text: "Oops, nothing found!",
		    width: "40%"
});