1

在本地提供以下演示时，我不断收到错误消息，抱怨无法运行动画。虽然它确实适用于我的 jsBin。

http://jsbin.com/kadugokade/edit?html,控制台,输出 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>

  <base href="http://polygit.org/polymer+:master/components/">
  <script src="webcomponentsjs/webcomponents-lite.js"></script>
  <link rel="import" href="polymer/polymer-element.html">
  <link rel="import" href="paper-menu-button/paper-menu-button.html">
  <link rel="import" href="paper-icon-button/paper-icon-button.html">
  <link rel="import" href="paper-listbox/paper-listbox.html">
  <link rel="import" href="paper-item/paper-item.html">
  <link rel="import" href="iron-icons/iron-icons.html">
  <link rel="import" href="iron-icon/iron-icon.html">

  <!-- Ensure Web Animations polyfill is loaded since neon-animation 2.0 doesn't import it -->
  <link rel="import" href="neon-animation/web-animations.html">

</head>
<body>
  <dom-module id="my-el">
    <template>
      <paper-menu-button>
        <paper-icon-button icon="menu" slot="dropdown-trigger" alt="menu"></paper-icon-button>
        <paper-listbox slot="dropdown-content">
          <paper-item>alpha</paper-item>
          <paper-item>beta</paper-item>
          <paper-item>gamma</paper-item>
          <paper-item>delta</paper-item>
          <paper-item>epsilon</paper-item>
        </paper-listbox>
      </paper-menu-button>
    </template>
    <script>
      class MyEl extends Polymer.Element {
        static get is() { return 'my-el' }
      }
      customElements.define(MyEl.is, MyEl);
    </script>
  </dom-module>

  <my-el></my-el>
</body>
</html>
4

1 回答 1

1

检查您是否web-animations-js/安装了以下导入所需的目录。

bower_components/neon-animation/web-animations.html 
<script src="../web-animations-js/web-animations-next-lite.min.js"></script>

您必须使用以下方法导入它：

bower install --save web-animations/web-animations-js
于 2017-07-10T07:44:15.513 回答