Removed GopherJS, basic frontend completed, need backend changes for

torrent storage

torrent-project/node_modules/material-ui/utils/requirePropFactory.js.flow

@@ -0,0 +1,25 @@
+// @flow weak
+
+const requirePropFactory = (componentNameInError: string) => {
+  const requireProp = (requiredProp: string) => (
+    props: Object,
+    propName: string,
+    componentName?: string,
+    location?: string,
+    propFullName?: string,
+  ) => {
+    const propFullNameSafe = propFullName || propName;
+
+    if (typeof props[propName] !== 'undefined' && !props[requiredProp]) {
+      return new Error(
+        `The property \`${propFullNameSafe}\` of ` +
+          `\`${componentNameInError}\` must be used on \`${requiredProp}\`.`,
+      );
+    }
+
+    return null;
+  };
+  return requireProp;
+};
+
+export default requirePropFactory;