javascript - 如何避免 javascript `window.open` 触发弹出窗口警报

Question

我正尝试在 jQuery 中构建一个站外通知功能。该脚本首先检查链接是否为外部链接，然后检查数据库表条目是否存在异常。如果链接是外部链接且不在异常(exception)列表中，请将访问者发送到通知页面。如果它是异常(exception)列表中的外部链接，则在没有通知页面的新窗口中打开链接。

我正在使用 jQuery $.post 调用将链接信息发送到 php 脚本，该脚本检索异常并返回是或否以判断是否需要转到通知屏幕.这是代码:

$('a').click(function(){
    var url =$(this).attr('href');

    if(url !== '#'){ 
        // ignore links that don't 'go' anywhere 

        if($(this).hasClass('alerted')){
            // .alerted is used on the notification page to show the user's already been notified & prevents an infinite loop of notifications.
            window.open(url);
            return false;

        }else if(url.substr(0,4) !='http'){
            // check that the url isn't an internal link ('/page.php' for example)
            return true;
        }

        // ajax script to check url is external and is there an exception. Returns as json object:
        // link: link
        // notify: true/false
        $.post("/scripts/form_process.php", { action : 'offsite', link: url}, function(data){
            if(data.notify == true){
                // if visitors should be notified, redirect to the following link:
                window.location= '/leaving-site?link='+encodeURIComponent(data.link);
                return false;
            }else{
                // if the link is in the exception list, don't notify but do open the link in a new window:
                window.open(data.link);
            }

        });
        return false;
    }
});

只要 window.open(url) 命令在 $.post success 函数中，浏览器就会将其视为弹出窗口而不是作为自然链接。据我所知，在 ajax 调用中使用 window.open 时，这似乎是一个问题。当我在这里使用它时:

        if($(this).hasClass('alerted')){
            // .alerted is used on the notification page to show the user's already been notified & prevents an infinite loop of notifications.
            window.open(url);
            return false;
        }

我没有得到弹出窗口拦截器。

我不能对异常(exception)列表进行硬编码，而且我必须检查每个链接 - 例如，我不能假设一个类将添加到需要通知的链接中。

如何在新标签页中打开外部链接并避免此代码中的弹出窗口拦截器？

Answer 1

经典的解决方法如下: 在 AJAX 调用之前创建新窗口:

var newWindow = window.open('', '_blank');

成功后 - 您将 URL 分配给新窗口，如下所示:

newWindow.location.href = 'http://example.com';

您的代码的完整示例:

$('a').click(function(){

    var url =$(this).attr('href');

    if(url !== '#'){ 
        // ignore links that don't 'go' anywhere 

        if($(this).hasClass('alerted')){
            // .alerted is used on the notification page to show the user's already been notified & prevents an infinite loop of notifications.
            window.location = url;
            return false;

        }else if(url.substr(0,4) !='http'){
            // check that the url isn't an internal link ('/page.php' for example)
            return true;
        }

        // ajax script to check url is external and is there an exception. Returns as json object:
        // link: link
        // notify: true/false
         var newWindow = window.open('', '_blank');
        $.post("/scripts/form_process.php", { action : 'offsite', link: url}, function(data){
            if(data.notify == true){
                // if visitors should be notified, redirect to the following link:
                newWindow.location.href= '/leaving-site?link='+encodeURIComponent(data.link);
                return false;
            }else{
                // if the link is in the exception list, don't notify but do open the link in a new window:
                newWindow.location.href(data.link);
            }

        });
        return false;
    }
});