WIP - add extractor, generate snippet_data

node_modules/fbjs/lib/isEmpty.js.flow

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2013-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 isEmpty
+ * @flow
+ */
+'use strict';
+/* eslint-disable fb-www/typeof-undefined */
+
+/* eslint-disable no-unused-vars */
+
+const invariant = require("./invariant");
+/**
+ * Checks if a value is empty.
+ */
+
+
+function isEmpty(value: mixed): boolean {
+  if (Array.isArray(value)) {
+    return value.length === 0;
+  } else if (typeof value === 'object') {
+    if (value) {
+      invariant(!isIterable(value) || value.size === undefined, 'isEmpty() does not support iterable collections.');
+
+      for (const _ in value) {
+        return false;
+      }
+    }
+
+    return true;
+  } else {
+    return !value;
+  }
+}
+
+function isIterable(value: any): boolean {
+  if (typeof Symbol === 'undefined') {
+    return false;
+  }
+
+  return value[Symbol.iterator];
+}
+
+module.exports = isEmpty;