如何获取CSS3转换结束的回调？

Question

我正在尝试以下操作，但根本没有回调

 $("#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

问题是因为您仅在页面加载时检查#panel是否具有close_wiki类-当单击按钮添加时，它将永远不会触发。

相反，将transitionEnded事件挂载到钩子上，并等待CSS转换完成后触发它。 另请注意，不建议使用bind() 。 您应该使用on()代替。 尝试这个：

 $("#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> 

还要注意的是，你可以让逻辑更简单（和删除需要勾transitionEnded ，只需切换的所有showPane的阶级#Panel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> 

Answer 2

您无需在页面加载和基于它的绑定事件时检查close_wiki类。 由于此类是在close_wikipedia单击上动态添加的。 您可以使用事件委托来在单击close_wiki时实现对过渡事件的回调。

 $("#panel").addClass("showPane"); $("#close_wikipedia").on("click", function() { $("#panel").addClass("close_wiki"); }); $(document).on("transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd",".close_wiki", function() { alert("called"); $("#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>