JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" name="data" onclick="udatabase()" id="udatabase"> Database
    <input type="radio" name="data" onclick="ucsv()" id="ucsv"/> CSV <br/>
  <div id="ifCSV" style="display:none">
    <input name="csv" type="file" id="csv" accept=".csv" required="required"/>gffgfg <br/>
</div>

JavaScript

function udatabase() {
    document.getElementById('ifCSV').style.display = "none";
}
function ucsv() {
    document.getElementById('ifCSV').style.display = "block";
}