I'm using babel 6.7 to build a single page React.js web app. I've tried to include all the relevant polyfills e.g. babel-polyfill to make it compatible with ES5 browsers. Even still, I get a javascript error every now and again like this

```
Object doesn't support property or method 'jscomp_symbol_iterator0'

```

mostly from users on windows 7 & 8.1 running IE10+.

I'm assuming it's something to do with js Symbol.iterator not being supported. Is there a way I can polyfill this for older browsers?

Thanks!