designer

designer.html

<link href="../core-scaffold/core-scaffold.html" rel="import">
<link href="../core-header-panel/core-header-panel.html" rel="import">
<link href="../core-menu/core-menu.html" rel="import">
<link href="../core-item/core-item.html" rel="import">
<link href="../core-icon-button/core-icon-button.html" rel="import">
<link href="../core-toolbar/core-toolbar.html" rel="import">
<link href="../core-menu/core-submenu.html" rel="import">
<link href="../paper-tabs/paper-tabs.html" rel="import">
<link href="../paper-tabs/paper-tab.html" rel="import">

<polymer-element name="my-element">

  <template>
    <style>    
      #design_host {
        position: absolute;
        width: 100%;
        height: 100%;
        box-sizing: border-box;
      }
      #core_scaffold {
        position: absolute;
        top: 0px;
        right: 0px;
        bottom: 0px;
        left: 0px;
        width: 100%;
        height: 100%;
      }
      #core_header_panel {
        background-color: rgb(255, 255, 255);
      }
      #core_toolbar {
        background-color: rgb(79, 125, 201);
        color: rgb(255, 255, 255);
      }
      #core_menu {
        font-size: 16px;
      }
      #core_item {
        opacity: 0.5;
      }
      #section {
        width: 100%;
        height: 100%;
        border: 5px solid rgb(204, 204, 204);
        left: 0px;
        top: 0px;
        position: absolute;
      }
      #paper_tabs {
        background-color: rgb(0, 188, 212);
        color: rgb(255, 255, 255);
        box-shadow: 0px 3px 2px rgba(0, 0, 0, 0.2);
      }
    </style>
    <core-scaffold id="core_scaffold">
      <core-header-panel mode="seamed" id="core_header_panel" flex navigation>
        <core-toolbar id="core_toolbar"></core-toolbar>
        <core-menu selected="History" valueattr="label" selectedindex="1" id="core_menu" theme="core-light-theme">
          <core-item id="core_item_chat" icon="settings" layout center horizontal label="Chat" onClick="a()"></core-item>
          <core-item id="core_item_history" icon="settings" layout center horizontal label="History" active></core-item>
        </core-menu>
      </core-header-panel>
      <div id="div" tool>ZeroCalories</div>
      <section id="section" layout vertical>
        <paper-tabs noink nobar selected="1" selectedindex="1" id="paper_tabs" horizontal center layout>
          <paper-tab id="paper_tab_chat" inline flex center-center horizontal layout>Chat</paper-tab>
          <paper-tab id="paper_tab_history"  active inline flex center-center horizontal layout>History</paper-tab>
        </paper-tabs>
        <section id="section1" flex relative>
      </section>
      </section>
    </core-scaffold>
  </template>

  <script>
 (function() {
      'use strict';

      Polymer({
        is: 'my-lement',

      a() {
      alert("Hi");
    } ,
    
      });
    })();

  </script>

</polymer-element>