Facebook最近在处理会话重定向的方式上做出了改变。有关公告，请参阅本周Operation Developer Love博客文章中的“会话重定向行为的更改”。

我使用这个，删除'#'符号。

<script type="text/javascript">
    if (window.location.hash && window.location.hash == '#_=_') {
        window.location.href = window.location.href.split('#_=_')[0];
    }
</script>

一个对我有用的解决方法(使用Backbone.js)是在传递给Facebook的重定向URL的末尾添加“#/”。Facebook将保留提供的片段，而不会附加自己的“_=_”。

返回时，Backbone将删除“#/”部分。对于AngularJS，在返回URL后附加“#!”应该可以工作。

注意，大多数浏览器在重定向(通过HTTP状态码300、301、302和303)时保留原始URL的片段标识符，除非重定向URL也有片段标识符。这似乎是被推荐的行为。

如果使用处理程序脚本将用户重定向到其他地方，则可以在此处的重定向URL后附加“#”，以将片段标识符替换为空字符串。

博士TL;

if (window.location.hash === "#_=_"){
    history.replaceState 
        ? history.replaceState(null, null, window.location.href.split("#")[0])
        : window.location.hash = "";
}

完整版本与一步一步的说明

// Test for the ugliness.
if (window.location.hash === "#_=_"){

    // Check if the browser supports history.replaceState.
    if (history.replaceState) {

        // Keep the exact URL up to the hash.
        var cleanHref = window.location.href.split("#")[0];

        // Replace the URL in the address bar without messing with the back button.
        history.replaceState(null, null, cleanHref);

    } else {

        // Well, you're on an old browser, we can get rid of the _=_ but not the #.
        window.location.hash = "";

    }

}

循序渐进:

We'll only get into the code block if the fragment is #_=_. Check if the browser supports the HTML5 window.replaceState method. Clean the URL by splitting on # and taking only the first part. Tell history to replace the current page state with the clean URL. This modifies the current history entry instead of creating a new one. What this means is the back and forward buttons will work just the way you want. ;-) If the browser does not support the awesome HTML 5 history methods then just clean up the URL as best you can by setting the hash to empty string. This is a poor fallback because it still leaves a trailing hash (example.com/#) and also it adds a history entry, so the back button will take you back to #_-_.

了解更多关于历史的知识。

了解window.location的更多信息。

如果您想从url中删除剩余的“#”

$(window).on('load', function(e){
  if (window.location.hash == '#_=_') {
    window.location.hash = ''; // for older browsers, leaves a # behind
    history.pushState('', document.title, window.location.pathname); // nice and clean
    e.preventDefault(); // no page reload
  }
})

Facebook最近在处理会话重定向的方式上做出了改变。有关公告，请参阅本周Operation Developer Love博客文章中的“会话重定向行为的更改”。