2 is: 'paper-icon-button',
10 Polymer.PaperInkyFocusBehavior
15 * The URL of an image for the icon. If the src property is specified,
16 * the icon property should not be.
23 * Specifies the icon name or index in the set of icons available in
24 * the icon's icon set. If the icon property is specified,
25 * the src property should not be.
32 * Specifies the alternate text for the button, for accessibility.
36 observer: "_altChanged"
40 _altChanged: function(newValue, oldValue) {
41 var label = this.getAttribute('aria-label');
43 // Don't stomp over a user-set aria-label.
44 if (!label || oldValue == label) {
45 this.setAttribute('aria-label', newValue);