The library is not working with IE10 , v0.12.1 , but v0.11.7 is fine

[aparij]

Looks like the changes in v.0.12.0 moving from props to context broke it on IE10.
It works fine with v0.11.7

The map is not initialized

The error message is :
ReactCompositeComponent.getChildContext(): childContextTypes must be defined in order to use getChildContext().

You can run the react-leaflet examples locally and see that none are working .

Not sure why the thing is not working. Babel should properly transpile from the ES7 static childContextTypes

[PaulLeCam]

Apparently IE <= 10 does not support proto so IE <= 10 isn't be supported by React-Leaflet from v0.12

[aparij]

Or you can add babel-polyfill to the dependencies.

[PaulLeCam]

If it works with babel-polyfill, why don't you add it to your app?

[aparij]

Well, the thing is I have it and it still doesn't work. Anyways I don't think adding babel-polyfill will help in this case, it's something else.

[dettier]

This is the reason it doesn't work in IE <= 10: https://babeljs.io/docs/usage/caveats/
You can just add protoToAssign and loose options in babel configuration to fix this.
babel-polyfill won't help with this one.

[webcarrot]

Version 2.0 work in IE >= 9 with https://www.npmjs.com/package/proto-polyfill