javascript - Layout Attribute not working -

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i'm doing stupidly wrong. i'm using polymer 1.0 , trying make basic module. when specify layout attributes won't work. however, if type class="layout flex [etc..]" , on, work. see below:

<script src="bower_components/webcomponentsjs/webcomponents.min.js"></script> <script src="bower_components/time-elements/time-elements.js"></script> <link rel="import" href="/bower_components/polymer/polymer.html">  <dom-module id="x-chat-list"> <template>     <section class="user-list" layout horizontal>         <div class="avatar {{color}}" style="background-image: url({{avatar}})">             <div class="status {{status}}"></div>         </div>         <div flex>             <div class="username">{{username}}</div>             <div class="text">{{text}}</div>         </div>         <time class="timestamp" is="relative-time" datetime="{{timestamp}}"></time>     </section> </template>  <script> polymer({         is: 'x-chat-list',         properties: {             avatar: '',             color: '',             username: '',             text: '',             status: '',             timestamp: new date().toisostring()         } }); </script> </dom-module>

it's if doesn't recognize polymer or something.

thank you!

layout attributes have been removed in 1.0 , replaced layout classes (migration guide). when using classes, doing right thing.


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