ViewportMetrics.js

/**
 * Copyright 2013 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @providesModule ViewportMetrics
 */

"use strict";

var ViewportMetrics = {

  currentScrollLeft: 0,

  currentScrollTop: 0,

  refreshScrollValues: function() {
    ViewportMetrics.currentScrollLeft =
      document.body.scrollLeft + document.documentElement.scrollLeft;
    ViewportMetrics.currentScrollTop =
      document.body.scrollTop + document.documentElement.scrollTop;
  }

};

module.exports = ViewportMetrics;