JSFiddle - React, Tailwind, and code Playground

HTML

<a href="javascript:alert('href triggered')" 
   onclick="if (checkToken()) {  return true; } else { console.log('return false - token false'); return false; }">
	 LIEN
</a>

JavaScript

var token = true;
function checkToken() {
	if (token == true) {
		token = false;
		return true;
	} else {
		return false;
	}
}