working on making the file upload work over websocket and json

goTorrentWebUI/node_modules/material-ui-upload/node_modules/fbjs/lib/invariant.js.flow

@@ -0,0 +1,54 @@
+/**
+ * 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 invariant
+ */
+
+'use strict';
+
+/**
+ * Use invariant() to assert state which your program assumes to be true.
+ *
+ * Provide sprintf-style format (only %s is supported) and arguments
+ * to provide information about what broke and what you were
+ * expecting.
+ *
+ * The invariant message will be stripped in production, but the invariant
+ * will remain to ensure logic does not differ in production.
+ */
+
+var validateFormat = function (format) {};
+
+if (__DEV__) {
+  validateFormat = function (format) {
+    if (format === undefined) {
+      throw new Error('invariant requires an error message argument');
+    }
+  };
+}
+
+function invariant(condition, format, a, b, c, d, e, f) {
+  validateFormat(format);
+
+  if (!condition) {
+    var error;
+    if (format === undefined) {
+      error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');
+    } else {
+      var args = [a, b, c, d, e, f];
+      var argIndex = 0;
+      error = new Error(format.replace(/%s/g, function () {
+        return args[argIndex++];
+      }));
+      error.name = 'Invariant Violation';
+    }
+
+    error.framesToPop = 1; // we don't care about invariant's own frame
+    throw error;
+  }
+}
+
+module.exports = invariant;