Нужно найти" близкий " класс внутри нескольких div в jquery.

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<<pre lang="HTML">div class="modal" aria-hidden="false" tabindex="-1"><div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title">Help</h4> </div> <div class="modal-body" style="max-height: 300px; overflow: scroll;"><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>ENTER</kbd></label><span>Insert Paragraph</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+Z</kbd></label><span>Undoes the last command</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+Y</kbd></label><span>Redoes the last command</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>TAB</kbd></label><span>Tab</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>SHIFT+TAB</kbd></label><span>Untab</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+B</kbd></label><span>Set a bold style</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+I</kbd></label><span>Set a italic style</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+U</kbd></label><span>Set a underline style</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+SHIFT+S</kbd></label><span>Set a strikethrough style</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+BACKSLASH</kbd></label><span>Clean a style</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+SHIFT+L</kbd></label><span>Set left align</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+SHIFT+E</kbd></label><span>Set center align</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+SHIFT+R</kbd></label><span>Set right align</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+SHIFT+J</kbd></label><span>Set full align</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+SHIFT+NUM7</kbd></label><span>Toggle unordered list</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+SHIFT+NUM8</kbd></label><span>Toggle ordered list</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+LEFTBRACKET</kbd></label><span>Outdent on current paragraph</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+RIGHTBRACKET</kbd></label><span>Indent on current paragraph</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+NUM0</kbd></label><span>Change current block's format as a paragraph(P tag)</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+NUM1</kbd></label><span>Change current block's format as H1</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+NUM2</kbd></label><span>Change current block's format as H2</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+NUM3</kbd></label><span>Change current block's format as H3</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+NUM4</kbd></label><span>Change current block's format as H4</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+NUM5</kbd></label><span>Change current block's format as H5</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+NUM6</kbd></label><span>Change current block's format as H6</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+ENTER</kbd></label><span>Insert horizontal rule</span><div class="help-list-item"></div><label style="width: 180px; margin-right: 10px;"><kbd>CTRL+K</kbd></label><span>Show Link Dialog</span></div> <div class="modal-footer"><p class="text-center"><a href="//summernote.org/" target="_blank">Summernote 0.8.1</a> · <a href="//github.com/summernote/summernote" target="_blank">Project</a> · <a href="//github.com/summernote/summernote/issues" target="_blank">Issues</a></p></div> </div></div></div
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Что я уже пробовал:

не удалось найти класс div для кнопки закрытия.

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