Babel uses 'use strict' by default. For 0.35.0, edit [Libraries/Utilities/UIManager.js:68](https://github.com/facebook/react-native/blob/v0.35.0/Libraries/Utilities/UIManager.js#L68) with: ```js var normalizePrefix = function(moduleName: string): string { ``` See + <https://github.com/facebook/react-native/pull/11390> + <https://github.com/facebook/react-native/issues/11389>