<head>
<style type="text/css">
link {
    display: block;
    width: 100px;
    height: 100px;
    border: 1px solid red;
}
</style>
</head>
<div></div>
<link id="target" href="html-link-element-activation-behavior-target.html">
<script>
function elementClick(){
    document.getElementById("target").click();
}
window.addEventListener("message", elementClick);
</script>