1 files changed, 53 insertions, 0 deletions
diff --git a/node_modules/react-dom/lib/SyntheticWheelEvent.js b/node_modules/react-dom/lib/SyntheticWheelEvent.js
new file mode 100644
index 000000000..e3ac8f9fa
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+++ b/node_modules/react-dom/lib/SyntheticWheelEvent.js
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+/**
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+'use strict';
+
+var SyntheticMouseEvent = require('./SyntheticMouseEvent');
+
+/**
+ * @interface WheelEvent
+ * @see http://www.w3.org/TR/DOM-Level-3-Events/
+ */
+var WheelEventInterface = {
+  deltaX: function (event) {
+    return 'deltaX' in event ? event.deltaX :
+    // Fallback to `wheelDeltaX` for Webkit and normalize (right is positive).
+    'wheelDeltaX' in event ? -event.wheelDeltaX : 0;
+  },
+  deltaY: function (event) {
+    return 'deltaY' in event ? event.deltaY :
+    // Fallback to `wheelDeltaY` for Webkit and normalize (down is positive).
+    'wheelDeltaY' in event ? -event.wheelDeltaY :
+    // Fallback to `wheelDelta` for IE<9 and normalize (down is positive).
+    'wheelDelta' in event ? -event.wheelDelta : 0;
+  },
+  deltaZ: null,
+
+  // Browsers without "deltaMode" is reporting in raw wheel delta where one
+  // notch on the scroll is always +/- 120, roughly equivalent to pixels.
+  // A good approximation of DOM_DELTA_LINE (1) is 5% of viewport size or
+  // ~40 pixels, for DOM_DELTA_SCREEN (2) it is 87.5% of viewport size.
+  deltaMode: null
+};
+
+/**
+ * @param {object} dispatchConfig Configuration used to dispatch this event.
+ * @param {string} dispatchMarker Marker identifying the event target.
+ * @param {object} nativeEvent Native browser event.
+ * @extends {SyntheticMouseEvent}
+ */
+function SyntheticWheelEvent(dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget) {
+  return SyntheticMouseEvent.call(this, dispatchConfig, dispatchMarker, nativeEvent, nativeEventTarget);
+}
+
+SyntheticMouseEvent.augmentClass(SyntheticWheelEvent, WheelEventInterface);
+
+module.exports = SyntheticWheelEvent;
+\ No newline at end of file