requestAnimationFrame.js 1.4 KB

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  1. /*
  2. *
  3. * Licensed to the Apache Software Foundation (ASF) under one
  4. * or more contributor license agreements. See the NOTICE file
  5. * distributed with this work for additional information
  6. * regarding copyright ownership. The ASF licenses this file
  7. * to you under the Apache License, Version 2.0 (the
  8. * "License"); you may not use this file except in compliance
  9. * with the License. You may obtain a copy of the License at
  10. *
  11. * http://www.apache.org/licenses/LICENSE-2.0
  12. *
  13. * Unless required by applicable law or agreed to in writing,
  14. * software distributed under the License is distributed on an
  15. * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  16. * KIND, either express or implied. See the License for the
  17. * specific language governing permissions and limitations
  18. * under the License.
  19. *
  20. */
  21. /*
  22. * requestAnimationFrame
  23. *
  24. * This is used throughout the BB10 File implementation to wrap
  25. * native webkit calls. There is a bug in the webkit implementation
  26. * which causes callbacks to never return when multiple file system
  27. * APIs are called in sequence. This should also make the UI more
  28. * responsive during file operations.
  29. *
  30. * Supported on BB10 OS > 10.1
  31. */
  32. var requestAnimationFrame = window.requestAnimationFrame;
  33. if (typeof(requestAnimationFrame) !== 'function') {
  34. requestAnimationFrame = function (cb) { cb(); };
  35. }
  36. module.exports = requestAnimationFrame;