如何确定引导崩溃是打开还是关闭? [英] How to determine if a bootstrap collapse is opening or closing?

问题描述

如果我发生了自举崩溃，如何从点击事件中确定崩溃是打开还是关闭?

If I have a bootstrap collapse how can I determine from a click event wether the collapse is opening or closing?

这是我的点击事件，或者也许有比使用点击事件更好的方法了?

Here is my click event or maybe there is a better way then to use a click event?

$(document).on("click", "a.register-student-link", function() {
    // do some stuff to check if opening or closing
}

<div>
  <a id=@space.EventId class="register-student-link" data-toggle="collapse" href=@spaceIdWith aria-expanded="false" aria-controls="collapseExample">
                                                    Register Student
                                                </a>
</div>

推荐答案

如果该区域是否折叠，Bootstrap使用aria-expanded属性显示true或false.

Bootstrap uses the aria-expanded attribute to show true or false if the region is collapsed or not.

var isExpanded = $(collapsableRegion).attr("aria-expanded");

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