samples/third_party/todomvc_performance/js_todomvc/elements/td-item.html

<link rel="import" href="../components/polymer/polymer.html">
<link rel="import" href="td-input.html">

<polymer-element name="td-item" extends="li" attributes="item editing" on-blur="{{commitAction}}">
	<template>
		<link rel="stylesheet" href="td-item.css">
		<div class="view {{ {completed: item.completed, editing: editing} | tokenList }}" hidden?="{{editing}}" on-dblclick="{{editAction}}">
			<input type="checkbox" class="toggle" checked="{{item.completed}}" on-click="{{itemChangeAction}}">
			<label>{{item.title}}</label>
			<button class="destroy" on-click="{{destroyAction}}"></button>
		</div>
		<input is="td-input" id="edit" class="edit" value="{{item.title}}" hidden?="{{!editing}}" on-td-input-commit="{{commitAction}}" on-td-input-cancel="{{cancelAction}}">
	</template>
	<script>
		(function() {
			Polymer('td-item', {
				editing: false,
				editAction: function() {
					this.editing = true;
					// schedule focus for the end of microtask, when the input will be visible
					this.asyncMethod(function() {
						this.$.edit.focus();
					});
				},
				commitAction: function() {
					if (this.editing) {
						this.editing = false;
						this.item.title = this.item.title.trim();
						if (this.item.title === '') {
							this.destroyAction();
						}
						this.fire('td-item-changed');
					}
				},
				cancelAction: function() {
					this.editing = false;
				},
				itemChangeAction: function() {
					this.fire('td-item-changed');
				},
				destroyAction: function() {
					this.fire('td-destroy-item', this.item);
				}
			});
		})();
	</script>
</polymer-element>