1 files changed, 62 insertions, 0 deletions
diff --git a/node_modules/fbjs/lib/getViewportDimensions.js.flow b/node_modules/fbjs/lib/getViewportDimensions.js.flow
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index 000000000..4b03807ad
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+++ b/node_modules/fbjs/lib/getViewportDimensions.js.flow
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+/**
+ * Copyright (c) 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.
+ *
+ * @providesModule getViewportDimensions
+ * @flow
+ * @typechecks
+ */
+
+type ViewportDimensions = { width: number; height: number; };
+
+function getViewportWidth(): number {
+  let width;
+  if (document.documentElement) {
+    width = document.documentElement.clientWidth;
+  }
+
+  if (!width && document.body) {
+    width = document.body.clientWidth;
+  }
+
+  return width || 0;
+}
+
+function getViewportHeight(): number {
+  let height;
+  if (document.documentElement) {
+    height = document.documentElement.clientHeight;
+  }
+
+  if (!height && document.body) {
+    height = document.body.clientHeight;
+  }
+
+  return height || 0;
+}
+
+/**
+ * Gets the viewport dimensions including any scrollbars.
+ */
+function getViewportDimensions(): ViewportDimensions {
+  return {
+    width: window.innerWidth || getViewportWidth(),
+    height: window.innerHeight || getViewportHeight()
+  };
+}
+
+/**
+ * Gets the viewport dimensions excluding any scrollbars.
+ */
+getViewportDimensions.withoutScrollbars = function (): ViewportDimensions {
+  return {
+    width: getViewportWidth(),
+    height: getViewportHeight()
+  };
+};
+
+module.exports = getViewportDimensions;
+\ No newline at end of file