JSFiddle - React, Tailwind, and code Playground

HTML

<a href="mypage.php?x=123456"></a>

JavaScript

(function(){
    var el = document.querySelector('a[href^="mypage.php"]');
    var evt;
    if (document.createEvent) {
        evt = document.createEvent("MouseEvents");
        evt.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
    }
    (evt) ? el.dispatchEvent(evt) : (el.click && el.click());
})();