html - 在其他内容上方浮动一个下拉菜单

Question

这是我的问题：

我有一个带有输入字段和下拉菜单的纸质对话框。这是代码（玉）：

paper-action-dialog#createMatch(ng-heading="'Create Match' | translate", transition="core-transition-bottom", style="width: 600px")
  p
    | {{"Choose your match options" | translate}}
  p
    paper-input#matchNameInput(floatinglabel="",ng-label="'Match Name' | translate", required="", ng-error="'You must enter a match name.' | translate",style="padding: 0")
  p
    paper-dropdown-menu#gameModeInput(ng-label="'Game mode' | translate")
      paper-dropdown.dropdown
        core-menu.menu
          paper-item(ng-repeat="(id, name) in GameModeN" value="{{id}}") {{name}}
  paper-button(affirmative="") {{"Cancel" | translate}}
  paper-button.primary-btn(affirmative="", autofocus="") {{"Create" | translate}}

这是转换后的 HTML，如果它让你眼花缭乱的话：

<paper-action-dialog id="createMatch" heading="Create Match" transition="core-transition-bottom" style="width: 600px">
  <p>Choose your match options</p>
  <p>
    <paper-input id="matchNameInput" floatinglabel="" label="Match Name" required=""></paper-input>
  </p>
  <p>
    <paper-dropdown-menu id="gameModeInput" label="Game Mode">
      <paper-dropdown class="dropdown">
        <core-menu class="menu">
          <paper-item value="value">Item</paper-item>
        </core-menu>
      </paper-dropdown>
    </paper-dropdown-menu>
  </p>
  <paper-button affirmative="">Cancel</paper-button>
  <paper-button affirmative="" autofocus="" class="primary-btn">Create</paper-button>
</paper-action-dialog>

我已经尝试过使用position:absolute菜单及其父项上的几乎所有位置类型组合。似乎没有任何效果。也许这是因为它在一个shadow dom中？我怎样才能让菜单浮在其他所有东西上？

Answer 1

该layered属性应该这样做

  <paper-dropdown class="dropdown" layered="true">
    <core-menu class="menu">
      <paper-item value="value">Item</paper-item>
    </core-menu>
  </paper-dropdown>