1// Copyright 2014 Google Inc. All rights reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5//   You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12//   See the License for the specific language governing permissions and
13// limitations under the License.
14
15(function(scope, testing) {
16
17  function merge(left, right) {
18    if (left != 'visible' && right != 'visible') return;
19    return [0, 1, function(x) {
20      if (x <= 0) return left;
21      if (x >= 1) return right;
22      return 'visible';
23    }];
24  }
25
26  scope.addPropertiesHandler(String, merge, ['visibility']);
27
28})(webAnimations1);
29
30