JSFiddle - React, Tailwind, and code Playground

HTML

<a href="https://qawithexperts.com" id="checkConfirmation">Navigate to other website</a>

JavaScript

var anchorLink = document.getElementById('checkConfirmation');


    anchorLink.onclick = function() {
        var check = confirm("Are you sure you want to leave?");
        if (check == true) {
            return true;
        }
        else {
            return false;
        }
    };