javascript - 如何获得 css3 过渡结束的回调？

Question

我正在尝试以下操作，但根本没有收到任何回调

$("#panel").addClass("showPane");
$("#close_wikipedia").on("click", function() {
  $("#panel").addClass("close_wiki");
});

if ($("#panel").hasClass("close_wiki")) {
  $(this).bind("transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd", function() {
    $("#panel").removeClass("close_wiki showPane");
  });
}

#panel {
  position: fixed;
  background: #444;
  height: 100%;
  width: 50vw;
  right: -100vw;
  transition: right 0.4s ease-in-out;
  -o-transition: right 0.4s ease-in-out;
  -ms-transition: right 0.4s ease-in-out;
  -moz-transition: right 0.4s ease-in-out;
  -webkit-transition: right 0.4s ease-in-out;
  z-index: 9999;
  top: 0;
  bottom: 0;
  height: 100vh;
  overflow-y: auto;
}
#panel.showPane {
  right: 0;
}
#panel.close_wiki {
  right: -100vw;
  transition: right 0.4s ease-in-out;
  -o-transition: right 0.4s ease-in-out;
  -ms-transition: right 0.4s ease-in-out;
  -moz-transition: right 0.4s ease-in-out;
  -webkit-transition: right 0.4s ease-in-out;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="panel">
  <h2>Wikipedia results</h2>
  <div class="panel-group" id="accordionWiki" role="tablist" aria-multiselectable="true"></div>
  <button id="close_wikipedia" type="button" class="btn btn-danger">Close Wiki</button>
</div>

Answer 1

问题是因为您只在页面加载时检查 #panel 是否有 close_wiki 类 - 它永远不会触发，因为它是在单击按钮时添加的。

而是钩住 transitionEnded 事件 onload 并等待它在 CSS 转换完成后触发。另请注意，bind() 已弃用。您应该改用 on()。试试这个:

$("#close_wikipedia").on("click", function() {
  $("#panel").removeClass("showPane");
});

#panel {
  position: fixed;
  background: #444;
  height: 100%;
  width: 50vw;
  right: -100vw;
  transition: right 0.4s ease-in-out;
  -o-transition: right 0.4s ease-in-out;
  -ms-transition: right 0.4s ease-in-out;
  -moz-transition: right 0.4s ease-in-out;
  -webkit-transition: right 0.4s ease-in-out;
  z-index: 9999;
  top: 0;
  bottom: 0;
  height: 100vh;
  overflow-y: auto;
}
#panel.showPane {
  right: 0;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="panel" class="showPane">
  <h2>Wikipedia results</h2>
  <div class="panel-group" id="accordionWiki" role="tablist" aria-multiselectable="true"></div>
  <button id="close_wikipedia" type="button" class="btn btn-danger">Close Wiki</button>
</div>

另请注意，您可以使逻辑更简单(并完全不需要 Hook transitionEnded，只需切换 上的 showPane 类#面板元素。

$('#panel').addClass('showPane');

$("#close_wikipedia").on("click", function() {
  $("#panel").removeClass("showPane");
});

#panel {
  position: fixed;
  background: #444;
  height: 100%;
  width: 50vw;
  right: -100vw;
  transition: right 0.4s ease-in-out;
  -o-transition: right 0.4s ease-in-out;
  -ms-transition: right 0.4s ease-in-out;
  -moz-transition: right 0.4s ease-in-out;
  -webkit-transition: right 0.4s ease-in-out;
  z-index: 9999;
  top: 0;
  bottom: 0;
  height: 100vh;
  overflow-y: auto;
}
#panel.showPane {
  right: 0;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="panel">
  <h2>Wikipedia results</h2>
  <div class="panel-group" id="accordionWiki" role="tablist" aria-multiselectable="true"></div>
  <button id="close_wikipedia" type="button" class="btn btn-danger">Close Wiki</button>
</div>