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third_party/polymer/components/paper-input/paper-textarea.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
@@ skipping 21 matching lines @@
 See `Polymer.PaperInputContainer` for a list of custom properties used to
 style this element.
 -->
 
 <dom-module id="paper-textarea">
   <template>
     <style>
       :host {
         display: block;
       }
+
+      :host([hidden]) {
+        display: none !important;
+      }
     </style>
 
     <paper-input-container no-label-float$="[[noLabelFloat]]" always-float-label="[[_computeAlwaysFloatLabel(alwaysFloatLabel,placeholder)]]" auto-validate$="[[autoValidate]]" disabled$="[[disabled]]" invalid="[[invalid]]">
 
-      <label hidden$="[[!label]]">[[label]]</label>
+      <label hidden$="[[!label]]" aria-hidden="true">[[label]]</label>
 
       <iron-autogrow-textarea id="input" class="paper-input-input"
         bind-value="{{value}}"
         disabled$="[[disabled]]"
         autocomplete$="[[autocomplete]]"
         autofocus$="[[autofocus]]"
         inputmode$="[[inputmode]]"
         name$="[[name]]"
         placeholder$="[[placeholder]]"
         readonly$="[[readonly]]"
@@ skipping 68 matching lines @@
 
     _ariaDescribedByChanged: function(ariaDescribedBy) {
       this.$.input.textarea.setAttribute('aria-describedby', ariaDescribedBy);
     },
 
     get _focusableElement() {
       return this.$.input.textarea;
     },
   });
 </script>