function _ref8(callback) {
    return setTimeout(function () {
      return callback(Date.now())
    }, 1000 / 60)
  }
/**
   * A shim for the requestAnimationFrame which falls back to the setTimeout if
   * first one is not supported.
   *
   * @returns {number} Requests' identifier.
   */
A shim for the requestAnimationFrame which falls back to the setTimeout if
first one is not supported.

@returns {number} Requests' identifier.
A shim for the requestAnimationFrame which falls back to the setTimeout if first one is not supported . @returns { number } Requests ' identifier .
function _ref8(callback) {
    return setTimeout(function () {
      return callback(Date.now())
    }, 1000 / 60)
  }
function _ref8 ( callback ) { return setTimeout ( function ( ) { return callback ( Date . now ( ) ) } , 1000 / 60 ) }
A shim for the requestAnimationFrame which falls back to the setTimeout if
 first one is not supported.
A shim for the requestAnimationFrame which falls back to the setTimeout if first one is not supported .