如何在子窗口中检测 location.hostname？ [复制]

Question

我需要在 javascript（或 JQuery）中检测子窗口选项卡中的实际 url..

例子：

parent.php

<script type="text/javascript">

    function openInNewTab(url) {
        var child = window.open(url, '_blank');
        child.focus();
        var timer = setInterval(checkChild, 500);

        function checkChild() {

            document.write("Show here the location.hostname from child window");

        }

    }

</script>

<button onclick="openInNewTab('//mypage.com/child.php');">Open Child</button>

child.php

<a href="//google.com">Go to google</a>
<a href="//facebook.com">Go to facebook</a>

如果用户打开 child.php，则在 parent.php“mypage.com”中显示，但如果用户按下“go to google”中的点击，则在 parent.php 中显示“google .com”或在“转到 facebook”中显示“facebook.com”

我需要在 javascript（或 JQuery）中完成这项工作

Answer 1

试试这个

function openInNewTab(url) {
    var child = window.open(url, '_blank');
    child.focus();
    var timer = setInterval(function(){
        checkChild(child);      
    }, 500);

    function checkChild(child) {
        document.write(child.location.href , "   ");
    }

}