JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" id="disable">Disable\Enable</a>
<br><br>
<input type="submit" id="submit" value="Send!">

JavaScript

var submit = document.getElementById("submit");

submit.onclick = function() {
    alert("I'm clickable!");
};
                    
document.getElementById("disable").onclick = function() {
    submit.getAttribute("disabled") ? submit.removeAttribute("disabled") : submit.setAttribute("disabled", "disabled");
    };