meteor - Set default value if nothing is selected -


the code below expected set headerlabel "select item" when app first starts. once item selected, headerlabel expected show item name. able second parts not first. thanks

//---main_menu.js-----------------------  template.mainmenu.helpers({    menuitems: [      {menuitem: "task1"},      {menuitem: "task2"},      {menuitem: "task3"},      {menuitem: "task4"},      {menuitem: "task5"},      {menuitem: "task6"},      {menuitem: "task7"}      ]  });    template.mainmenu.events({    'click .menuitem': function(event){      session.set('selecteditem', $(event.currenttarget).data('value'));    }  });    //---header.js-----------------------  template.header.events({    'click .mainmenu': function(){      alert("show main menu ");    }  });    template.header.helpers({    headerlabel: function(){      var selected = session.get('selecteditem');      if (selected === "") {        headerlabel: "select item";      } else {        return selected;      }    }  });
//---main_menu.html--------------------  <template name="mainmenu">    <div class="container">      <div class="row">        <section class="col-xs-12">          <div class="list-group">            {{#each menuitems}}              <a href="#" class="list-group-item menuitem" data-value={{menuitem}}>                <img src="/abc.png">                {{menuitem}} <span class="badge">&#x3e;</span>              </a>            {{/each}}          </div>        </section>      </div>s    </div>  </template>    //---header.html-----------------------  <template name="header">    <h1>      <button class="col-xs-2 mainmenu" type="button">&#9776;</button>    </h1>    <h3><label class="col-xs-8 text-center">{{headerlabel}}</label></h3>    <h1>      <button class="col-xs-2" type="button">&#8942;</button>    </h1>  </template>

very simple actually:

<h3><label class="col-xs-8 text-center">{{#if headerlabel}}{{headerlabel}}{{else}}default value{{/if}}</label></h3>

and in js code can do

template.header.helpers({   headerlabel: function(){     return session.get('selecteditem');   } });

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