CSS - 奇怪的flex + bootstrap在移动设备上的下拉菜单交互＆lt; 767px

Question

我已经被困了一个星期，我真的需要帮助。到处搜索但无济于事。我面临的问题是当我打开一个可从列表中的另一个项目切换的下拉菜单时，我的弹性项目会被水平推动。描述问题的屏幕截图：http://imgur.com/H6FUf3o

我正在使用rails并做出反应。

header.html.erb

<nav data-behavior="animated-navbar" class="navbar navbar-default navbar-fixed-top">
  <div class="container-fluid col-md-10 col-md-offset-1">
    <div class="navbar-header">
      <%= link_to root_path, class: "navbar-brand", id: "logo" do %>
          <%= image_tag('logo.png', width: 55) %>
      <% end %>
    </div>
    <ul class="nav navbar-nav filter-links">
      <li>
        <% if user_signed_in? %>
          <%= nav_link_to "Home", root_path %>
        <% else %>
          <%= nav_link_to "Staff pick", root_path %>
        <% end %>
      </li>
      <li><%= nav_link_to "Top stories", top_stories_path %></li>
      <% if user_signed_in? %>
        <li><%= nav_link_to "Bookmarks", dashboard_bookmarks_path %></li>
      <% else %>
        <li><a href='' data-behavior="trigger-overlay">Bookmarks</a></li>
      <% end %>
    </ul>

    <div class="folding-nav">
      <ul class="nav navbar-nav navbar-right">
        <li class="main-searchbar">
          <%= react_component('SearchContainer') %>
        </li>
        <% if user_signed_in? %>
          <li class="new-post-button"><%= link_to "Write a story", new_post_path, class: "button" %></li>
          <li id="notifications">
            <%= react_component('NotificationsContainer', {}) %>
          </li>
          <%= render 'layouts/avatar_dropdown' %>
        <% else %>
          <li class="new-post-button"><%= link_to "Write a story", new_post_path, class: "button", data: { behavior: 'trigger-overlay' } %></li>
          <li class="sign-in-button"><%= link_to "Sign in / Sign up", new_user_session_path, class: 'button green-border-button', data: { behavior: 'trigger-overlay' } %></li>
        <% end %>
      </ul>
    </div>

  </div>
</nav>

header.scss

body {
  padding-top: 0;
}

.container-fluid, .container {
  padding: 0;
}
.navbar-header {
  padding: 8px 0;
  border-bottom: 1px solid $super-light-gray;
}
.navbar-fixed-top {
  position: relative;
}
.navbar-nav, .navbar-nav > li {
  display: inline-block;
}
.navbar-nav {
  margin: 5 10px;
}
.navbar-nav > .open > a {
  background-color: $white !important;
}
.navbar-nav > li > a {
  padding: 7px 24px;
}

/** Navbar animation **/
nav.navbar {
  transition: 0.3s transform;
  &.is-inView {
    transform: translateY(0);
  }
  &.is-hidden {
    transform: translateY(-100%);
  }
}

.navbar-admin {
  ul.nav.navbar-nav > li > a {
    color: #fff;
    border: none;
  }
}

nav.navbar {
  margin-bottom: 0;
  border-radius: 0;
  border-color: $super-light-gray;
  &.navbar-default {
    background-color: $greenlight;
  }

  .navbar-brand {
    height: 40px;
  }
  .regular-nav {
    color: $white;
  }
  .filter-links {
    margin-left: 9px;
    li > a {
      text-decoration: none;
      font-family: 'CaviarBI';
      font-size: 18px;
      color: $white;
      font-weight: 400;
      &.active {
        font-size: 25px;
      }
    }
  }

  .folding-nav {
    position: absolute;
    top: 3px;
    right: 0;
  }
  .navbar-right {
    margin: 0;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-end;
    align-content: stretch;
    align-items: flex-start;
  }

  .navbar-right > li {
    order: 0;
    flex: 0 1 auto !important;
    align-self: auto !important;
  }

  .new-post-button {
    display: none;
  }
  .new-post-button a {
    transition: all .1s;
    color: $light-gray;
    font-family: 'Caviar';
    font-weight: 600;
    background-color: $white;
  }
  .new-post-button:hover {
    a {
      color: $greenlight;
      border-color: $border-hover-color;
      background-color: $white;
    }
  }
  .new-post-button,
  .sign-in-button  {
    margin-top: 5px;
    margin-right: 10px;
    .button {
      padding: 0.6em 1em 0.7em 1em;
    }
  }

  .account {
    padding-top: 5px;
  }
  a.avatar-wrapper {
    padding: 0;
    display: inline;
    float:none;
    margin: 3px 15px 0 10px;
  }
  a.avatar-wrapper img.avatar-image {
    border: 1.5px solid $border-color;
    transition: all .1s;
  }
  a.avatar-wrapper:hover img.avatar-image, .open a.avatar-wrapper img.avatar-image {
    border: 1.5px solid $border-hover-color;
  }

  .nav-dropdown {
    background: #fff;
    @include border-radius($popover);
    box-shadow: 0 1px 2px rgba(0,0,0,.25),0 0 1px rgba(0,0,0,.35);
    border: none;
    top: 134%;

    right: 20px;
    a {
      color: $light-font-color;
      &:hover {
        background-color: $white;
        color: rgba(0,0,0,0.8);
      }
    }
    .nd-main {
      font-size: 16px;
      font-weight: 100px;
      line-height: 1.4;
    }
    .nd-sub {
      font-size: 14px;
      font-weight: 100;
      line-height: 1.4;
    }
    .dropdown-arrow-top {
      width: 0;
      height: 0;
      border-left: 10px solid transparent;
      border-right: 10px solid transparent;
      z-index: 20;
      border-bottom: 10px solid #fff;
      position: absolute;
      right: 10px;
      top: -10px;
    }
    .dropdown-arrow-bottom {
      width: 0;
      height: 0;
      border-left: 12px solid transparent;
      border-right: 12px solid transparent;
      z-index: 10;
      border-bottom: 11px solid rgba(0, 0, 0, 0.11);
      position: absolute;
      right: 8px;
      top: -11px;
    }
  }

  #logo {
    width: 128px;
    margin-left: 15px;
    img {
      top: 5px;
      height: 31px;
    }
    span {
      right: 0;
      text-transform: uppercase;
      font-weight: bold;
    }
  }

}


/* Small devices (tablets, 768px and up) */
@media (min-width: $screen-sm-min) {

  body {
    padding-top: 67px;
  }
  .navbar-header {
    border-bottom: none;
  }
  .navbar-fixed-top {
    position: fixed;
  }
  nav.navbar {
    padding: 5px 0;
    .filter-links {
      margin-top: 16px;
      margin-left: 0;
    }
    #logo {
      width: 138px;
      margin-left: 0;
    }
    .new-post-button {
      display: inline-flex;
    }
  }
}


/* Medium devices (desktops, 992px and up) */
@media (min-width: $screen-md-min) {
  nav.navbar {
    #logo {
      width: 150px;
    }
  }
}

/* Large devices (large desktops, 1200px and up) */
@media (min-width: $screen-lg-min) {

}

@media (max-width: 767px){
  .navbar-nav
  .open .dropdown-menu {
      background-color: $white;
      box-shadow: 0 1px 2px rgba(0,0,0,.25),0 0 1px rgba(0,0,0,.35);
      clear:both;
  }


}

下拉菜单用于通知，完成反应。以下是反应渲染的内容：

render () {
    return (
      <div className="notification-container">
        <a className={`dropdown-toggle ${this.state.newNotificationCount > 0 ? 'active' : ''}`}
          onClick={() => this.handleMarkAsTouched()}
          data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
          {this.renderNotificationIcon()}
        </a>
        <div
          className="dropdown-menu"
          ref={(ref) => {this.dropdownRef = ref}}
        >
          <span className="dropdown-arrow-top"></span>
          <span className="dropdown-arrow-bottom"></span>
          <div className="notification-header">
            <span>Notifications</span>
            <a className="pull-right mark-all-as-read"
              onClick={(e) => this.handleMarkAllAsRead(e)}>
              Mark All as Read
            </a>
          </div>
          <ul
            onScroll={() => this.handleScroll()}
            ref={(ref) => {this.notificationsListRef = ref}}
            className="notifications-list">
            {this.renderNotificationItems()}
            {this.loadMoreButton()}
          </ul>
        </div>
      </div>
    );
  }

最后是notifications.scss：

#notifications {
  a.dropdown-toggle.active {
    background-color: rgba($accent-color, 0.8);
  }
  a.dropdown-toggle {
    display: inline-block;
    width: 40px;
    height: 40px;
    padding: 0;
    margin-top: 5px;
    position: relative;
    background-color: white;
    border: 1.5px solid $border-color;
    transition: all .1s;
    @include border-radius($round);
    i.fa-bell-o,
    span#new-notifications-count {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      font-size: 1.3em;
    }
    #bell {
      color: $light-font-color;
    }
    span#new-notifications-count {
      color: $white;
    }
  }
  a.dropdown-toggle:hover {
    border: 1.5px solid $border-hover-color;
    #bell{
      color: $greenlight;
    }
  }
}
.notification-container {
  .dropdown-menu {
    width: 360px;
    margin-top: 9px;
  }
  .notification-header {
    padding: 4px 20px;
    border-bottom: 1px solid $light-border-color;
    color: $font-black;
  }
  .mark-all-as-read {
    cursor: pointer;
    color: $light-font-color;
    &:hover,
    &:active {
      color: $accent-color;
    }
  }
  .notifications-list {
    overflow: hidden;
    overflow-y: scroll;
    max-height: 440px;
    list-style: none;
    padding: 0;
  }
  .load-more {
      text-align: center;
  }
  .dropdown-arrow-top {
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    z-index: 20;
    border-bottom: 10px solid #fff;
    position: absolute;
    right: 10px;
    top: -10px;
  }
  .dropdown-arrow-bottom {
    width: 0;
    height: 0;
    border-left: 12px solid transparent;
    border-right: 12px solid transparent;
    z-index: 10;
    border-bottom: 11px solid rgba(0, 0, 0, 0.11);
    position: absolute;
    right: 8px;
    top: -11px;
  }
}

.notifications-list {
  .avatar-image {
    margin-right: 18px;
    vertical-align: baseline;
  }
  li {
    padding: 8px 0;
    border-bottom: 1px solid $light-border-color;
    &.unread-notification {
      border-left: 2px solid $accent-color;
    }
  }
  li > a {
    color: $light-font-color;
    display: block;
    padding: 3px 0 3px 20px;
    clear: both;
    white-space: nowrap;
    font-weight: normal;
    transition: color 200ms;
    &:hover {
      color: $font-black;
    }
  }
  .notification-metadata {
    display: inline-block;
  }

  .fa {
    margin-right: 8px;
  }

  .fa-heart-o {
    color: #e81c4f;
  }

  .fa-user {
    color: lightblue;
  }

  .fa-commenting-o {
    color: $light-font-color;
  }
}

// Bell Animation for "No Notifications"

  .no-notifications {
    margin: 10px 11px 8px 10px;
    padding: 10px;
    text-align: center;
    position: relative;

    .speech-bubble {
      border: $border-color 1px solid;
      padding: 10px;
      @include border-radius($radius);
      width: 170px;
      margin: 0 auto;
      color: $light-font-color;
    }

    .speech-arrow-top {
      width: 0;
      height: 0;
      border-left: 11px solid transparent;
      border-right: 11px solid transparent;
      z-index: 20;
      border-top: 10px solid #fff;
      position: absolute;
      right: 46.7%;
      top: 36.5%;
    }

    .speech-arrow-bottom {
      width: 0;
      height: 0;
      border-left: 12px solid transparent;
      border-right: 12px solid transparent;
      z-index: 10;
      border-top: 11px solid $border-color;
      position: absolute;
      right: 46.3%;
      top: none;
    }

    .ringer {
      margin: 0 auto;
      width: 50px;
      margin-top: 20px;
    }
  }

  .bell-jar,.mouth,.eye{opacity:0.2;fill:$black;}

  .blink, {
    animation: blink 5s step-start 0s infinite;
  }

  @keyframes blink {
    53% {
      opacity: 0.2;
    }
    55% {
      opacity: 0.0;
    }
    57% {
      opacity: 0.2;
    }
    59% {
      opacity: 0.0;
    }
    61% {
      opacity: 0.2;
    }
}
@media (max-width: 767px){
  a.dropdown-toggle {
    float:right;
  }
}