x-scrollable.html 2.19 KB
Copyright (c) 2016 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

<link rel="import" href="../../polymer/polymer.html">
<link rel="import" href="../iron-scroll-target-behavior.html">

<dom-module id="x-scrollable">


    :host {
      display: block;
      font: 14px arial;

    .scrollState {
      border-left: 1px solid #ccc;
      border-right: 1px solid #ccc;
      border-bottom: 1px solid #ccc;
      font-weight: bold;
      background-color: #eee;
      position: fixed;
      top: 0;
      left: calc(50% - 100px);
      padding: 10px;
      width: 220px;
      text-align: center;

    .item {
      border-bottom: 1px solid #ccc;
      background-color: white;
      padding: 20px;
      width: 200%;



    <div class="scrollState">scrollTop: [[xScrollTop]] - scrollLeft: [[xScrollLeft]]</div>

    <template is="dom-repeat" items="[[_getItems(itemCount)]]">
      <div class="item">[[index]]</div>




    is: 'x-scrollable',

    properties: {

      xScrollTop: {
        type: Number,
        readOnly: true,
        value: 0

      xScrollLeft: {
        type: Number,
        readOnly: true,
        value: 0

      itemCount: {
        type: Number,
        value: 200


    behaviors: [

    attached: function() {

    _scrollHandler: function() {

    _getItems: function(itemCount) {
      var items = new Array(itemCount);
      while (itemCount > 0) {
        items[--itemCount] = true;
      return items;