<a href="https://www.youtube.com/" onclick="location.href='https://translate.google.com/';" target="_blank">
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</a>
<a href="http:/google.com" data-href2="https://translate.google.com/">Click</a>var els = document.querySelectorAll("a");
for(var i = 0; i < els.length;i++)
els[i].addEventListener("click",function(){if(this.getAttribute("data-href2"))window.open(this.getAttribute("data-href2"));},false)
<a href="https://google.ru/" target="_blank">Link</a>document.querySelector("a").addEventListener("click", function() {
document.location.href = "https://youtube.com/";
});