JSFiddle - React, Tailwind, and code Playground

HTML

<form method="POST" action="/tra.php" id="myform">
    <input type="hidden" value="test" name="var1">
    <input type="hidden" value="test" name="var2">
</form>
<a href="#" id="alink">ссылка</a>

JavaScript

document.getElementById("alink").onclick = function(){
   document.getElementById("myform").submit();
}