Incompatible ios9

[onlyxhb]

Not compatible with ios9, no Babel conversion

[sindresorhus]

This module mainly targets Node.js, not the browser. It's up to you to transpile it with Babel if you want to use it in the browser. You can find a more detailed explanation here: sindresorhus/ama#446

If you use Webpack, check out babel-engine-plugin, which transpiles only the dependencies that needs to be transpiled.

If you use Create React App, upgrade to Create React App v2. It supports automatic transpilation of dependencies, which will make this package just work.