JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
    <div class="block">
        <input type="text" name="file0"/>
    </div>
</div>
    <button></button>

JavaScript

$(document).ready(function(){
    var i = 0;
    $('button').click(function(){
        i++
        $('.main').append('<div class="block"><input type="text" name="file'+i+'"></div>')
    });
});