JSFiddle - React, Tailwind, and code Playground

HTML

MAIN  <input type='text' id='currencyVal' value=''>
<a href='#' id='currencyBtn'>copy</a><br>
<br>
COPY1 <input type='text' class='currencyCopy' value=''><br>
COPY2 <input type='text' class='currencyCopy' value=''><br>
COPY3 <input type='text' class='currencyCopy' value=''><br>
COPY4 <input type='text' class='currencyCopy' value=''><br>

JavaScript

$("#currencyBtn a").click(function(){
		var value = $('#currencyVal');
        var input = $('.currencyCopy');
        input.val(value);
	});