如何關閉下拉菜單，因為同一個 class 中的另一個菜單在 jquery / javascript 中打開？

Question

我創建了一個帶有鏈接的下拉菜單，單擊該鏈接使用戶能夠刪除消息、阻止對帖子發表評論等。

無論如何，一切都按預期進行。但是我想停止某些行為。 如果用戶單擊箭頭以顯示下拉菜單，它會顯示哪個很好，但是當用戶滾動到另一條消息/帖子並再次單擊箭頭時，兩個下拉菜單都保持打開狀態。

1. 我想在打開另一個菜單時關閉當前菜單。 因此一次只能打開 1 個菜單。

2. 出於某種原因，當我在頁面刷新后第一次單擊箭頭下拉菜單時，箭頭 hover state 在我滾動它時閃爍一次。 無論如何要阻止這個？

這是我當前的代碼：

Jquery：

$(".micropostOptions").click(function(e) {

    var $micropostOptions = $(this),
        $postMenu = $micropostOptions.children();

    e.stopPropagation();

        if ($postMenu.hasClass("postMenuActivate")) {
            $postMenu.hide().removeClass("postMenuActivate");
            $micropostOptions.removeClass("postMenuHoverState");
        } else {
            $postMenu.show(10).addClass("postMenuActivate");
            $micropostOptions.addClass('postMenuHoverState');
        };

});

CSS:

.micropostOptions {
    position:absolute;
    height:17px;
    width:17px  ;
    top:5px;
    right:5px;
    background:white url("/assets/arrow_down_alt1.png") no-repeat;
    background-position:0px 0px;

        &:hover {
            background: url("/assets/arrow_down_alt1_hover.png") no-repeat; 
            background-position:0px 0px;
            cursor:pointer !important;

        }

}

.postMenuActivate {
    display:block;
}

.postMenuHoverState {
    background: url("/assets/arrow_down_alt1_hover.png") no-repeat; 
    background-position:0px 0px;
    cursor:pointer !important;
}

.postMenu {
    position:absolute;
    display:none;
    padding-bottom:20px;
    background-color:white !important;
    border:1px solid $main-background-color;
    height:163px;
    width:170px;
    top:18px;
    right:2px;
    -webkit-box-shadow: 0 10px 6px -6px #777;
    -moz-box-shadow: 0 10px 6px -6px #777;
    box-shadow: 0 10px 6px -6px #777;
    color:gray;
    z-index:3000;

        li {

        font-size:12px;
        height:33px;
        background-color:white !important;

            a span {
                float:left;
                width:160px;
                height:33px;
                line-height:33px;
                padding-left:10px;
                color:gray;

                  &:hover {
                    background-color:#4D90FE !important;
                    color:white;
                    //  #DD4B39,#D14836
                    }
            }

            &:hover {
            background-color:#4D90FE;
            color:white;

            }
        }

        .deletePost {
            //position:relative;
            padding-top:0px !important;
            padding-left:0px !important;
            height:39px;
            width:170px;
            text-align:center;
            padding-bottom:7px;
            border-bottom:1px solid #d9d9d9;

                a {

                    span {
                    float:left;
                    padding-left:0px !important;                            
                        height:46px !important;
                        width:170px !important;
                        line-height:46px;
                    }
                }

                a span:hover {
                    background-color:#DD4B39 !important;
                    color:white;
                //  #DD4B39,#D14836
                }
        }

        .reportAbuse {
            border-top:1px solid #d9d9d9;

                a span:hover {
                    background-color:gray !important;;
                }

        }

}

HTML：

    <nav class="micropostOptions">
     <ul class="postMenu">
       <li class="deletePost"><%= link_to content_tag(:span, "Delete post"), m, :method => :delete, :confirm => "Are you sure?", :title => m.content, :class => "message_delete" %>
       </li>
       <li class="disableCommenting"><%= link_to content_tag(:span, "Pause commenting"), "2" %></li>
       <li class="blockCommenter"><%= link_to content_tag(:span, "Block commenter"), "3" %></li>
       <li class="openInNewWindow"><%= link_to content_tag(:span, "Open in new window"), "4" %></li>
       <li class="reportAbuse"><%= link_to content_tag(:span, "Report abuse"), "5" %></li>
     </ul>  
   </nav>

親切的問候

Answer 1

我無法在演示中復制您的代碼，所以我更改了 CSS：

jsFiddle 演示

$('.micropostOptions').on('click',function(){
    var postMenu = $(this).find('.postMenu');
    
    if( postMenu.is(':hidden') ){
        $('.postMenu').slideUp();
        postMenu.slideDown();
    }else{
        postMenu.slideUp() ;
    }
});

Answer 2

在這里有點盲目，因為我們只有一個菜單，但這能解決問題嗎？

$(".micropostOptions").click(function(e) {

    var $micropostOptions = $(this),
        $postMenu = $micropostOptions.children();

    e.stopPropagation();

        if ($postMenu.hasClass("postMenuActivate")) {
            $postMenu.hide().removeClass("postMenuActivate");
            $micropostOptions.removeClass("postMenuHoverState");
        } else {
            $postMenu.show(10).addClass("postMenuActivate");
            $micropostOptions.addClass('postMenuHoverState');
            $(".micropostOptions.postMenuHoverState")  //selects all micropostOptions with the postMenuHoverState class
                .not($micropostOptions)  //removes the current micropostOptions from the selected set
                .removeClass('postMenuHoverState')  //removes the postMenuHoverState class from all micropostOptions (besides teh current one)
                .children()  //gets the child menus of the set
                    .removeClass('postMenuActivate');  //removes postMenuActivate class from children of the active (but not current) micropostOptions

        };

});

Answer 3

我認為，您應該查看 jQuery 的 blur() 事件處理程序以在元素失去焦點時觸發事件： http://api.jquery.com/blur/