Issue in polymer core-menu

[mausu...@gmail.com]

Hello,

I am trying to use polymer core menu. Below is my code.On change of menu, i am trying log the selected menu.Though it is showing in the log selected item but it is throwing error as "Uncaught TypeError: Cannot read property 'id' of undefined " after the first selection.I am not sure where i am going wrong.Need help...

<polymer-element name="yo-menus" attributes="">

  <template>

    <link rel="stylesheet" href="yo-menus.css">

<section id="midas_menus">

 <core-ajax auto

               url="menus.json"

               response="{{menus}}"    

               handleas="json">

    </core-ajax>

<template if="{{menus}}">

<paper-menu-button>

        <paper-icon-button icon="menu" noink></paper-icon-button>

       

          <core-menu class="menu" selected="0" selectedItem="{{selectedMenu}}"  valueattr='id' on-core-select="{{mainMenu}}">

            <template repeat="{{menu in menus}}">

              <paper-item id="{{menu.name}}" label="{{menu.name}}" ></paper-item>

            </template>

          </core-menu>

       

      </paper-menu-button>

  

    </template>

  </template>

  </section>

  <script>

  Polymer('yo-menus', {

      // initialize the element's model

      ready: function() {

       

      },

 mainMenu : function(){

  console.log("New item selected: " + this.selectedMenu.id);

 }

    

    });

  </script>

</polymer-element>

Regards,

Mausumi

[Yvonne Yip]

core-selected is fired twice per selection change, once after the previously selected item was deselected and once after the item is selected. In the deselectione event selectedItem is null. You should look at event.details and check if this is a selection or deselection event, or check selectedItem for null.

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