JSFiddle - React, Tailwind, and code Playground

HTML

<button id="auth-button">Button</button>

<script>
var authorize = function(){
	alert("clicked");
}


var authButton= document.getElementById('auth-button');
authButton.addEventListener('click', authorize);

document.addEventListener('DOMContentLoaded', function() {
		console.log("ok");
   	authButton.click();
}, false);
</script>