JavaScript实现在新窗口跳转到不同端口号

HTMl:

<div id="button">按钮</div>

JavaScript:

var button = document.getElementById("button");
button.addEventListener('click', function(){
    let p = window.location.protocol;
    let hostname = window.location.hostname;
    let a = document.createElement("a");
    a.setAttribute("href", `${p}//${hostname}:8081`);
    a.setAttribute("target", "_blank");
    a.click();
    document.getElementsByTagName("body")[0].appendChild(a);
}, false)