WIP - add extractor, generate snippet_data

node_modules/fbjs/lib/requestAnimationFramePolyfill.js.flow

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+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @providesModule requestAnimationFramePolyfill
+ */
+var emptyFunction = require("./emptyFunction");
+
+var nativeRequestAnimationFrame = require("./nativeRequestAnimationFrame");
+
+var lastTime = 0;
+
+var requestAnimationFrame = nativeRequestAnimationFrame || function (callback) {
+  var currTime = Date.now();
+  var timeDelay = Math.max(0, 16 - (currTime - lastTime));
+  lastTime = currTime + timeDelay;
+  return global.setTimeout(function () {
+    callback(Date.now());
+  }, timeDelay);
+}; // Works around a rare bug in Safari 6 where the first request is never invoked.
+
+
+requestAnimationFrame(emptyFunction);
+module.exports = requestAnimationFrame;