javascript - use Polymerfire auth globally -


what best way if have firebase auth element using polymerfire, use user attribute globally?

for instance if have element login buttons:

<dom-module id="tab-b"> <template>    <style>    </style> <firebase-app auth-domain="example.firebaseapp.com"     database-url="example.firebaseio.com/"      api-key=""> </firebase-app> <firebase-auth id="auth" location="{{location}}" user="{{user}}"provider="google" on-error="handleerror"> </firebase-auth>  <paper-button id="googsignin" class$="signinbutton {{_getminiclass()}}"on-tap="login" raised>    google </paper-button>  </template>  <script>  (function() {   'use strict';   polymer({     is: 'tab-b',        properties:{          user: {         type: object         },          statusknown: {         type: object         }       },     login: function(){       return this.$.auth.signinwithpopup();     },     logout: function(){       return this.$.auth.signout();     }   }); })(); </script> </dom-module>

and want show or hide many components this:

<element  show$={{!user}}><element>

from app entry point (my-app.html), assign user values object that. object app become in charge of app state, can add property it

<!-- firebase authentication --> <firebase-auth   id="auth"   user="{{app.user}}"   status-known="{{app.availability.available}}"   online="{{app.availability.isonline}}"   signed-in="{{app.availability.userissignedin}}"   provider="google"> </firebase-auth>

add more information app object such display state.

<iron-media-query id="mq-phone"                   full                   query="(max-width:480px)"                   query-matches="{{app.display.isphonesize}}"></iron-media-query> <iron-media-query id="mq-tablet"                   full                   query="(min-width:481px) , (max-width:840px)"                   query-matches="{{app.display.istabletsize}}"></iron-media-query> <iron-media-query id="mq-desktop"                   query="(min-width:841px)"                   query-matches="{{app.display.isdesktopsize}}"></iron-media-query>

bind object other elements

 <!-- drawer content -->   <app-drawer id="drawer" slot="drawer">     <app-toolbar>menu</app-toolbar>     <iron-selector selected="[[page]]" attr-for-selected="name"         class="drawer-list" role="navigation">       <a name="view1" app="{{app}}" href="/view1">view one</a>       <a name="view2" app="{{app}}" href="/view2">view two</a>       <a name="view3" app="{{app}}" href="/view3">view three</a>     </iron-selector>   </app-drawer>

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