react-hot-loader: IE11 is throwing errors

So it’s broken again then. Some polyfills, like Promises or Object.assign, are commonly expected to be present 😦

Having the same issue @suhanw was showing.

Any news on this? Cannot run o IE11.

I’m on 4.13.0, and it appears Promise is still undefined, it’s throwing the error here: https://github.com/gaearon/react-hot-loader/blob/69b9d483ab3b5af3db8466bbdb124591d6670b81/src/global/generation.js#L59

Is this fixed? I am still getting Object.assign in 4.12.11 and 4.8.6 gives me Promise in undefined 😦

v4.8.6 would fix it

After some digging, I found that the new IE11 SyntaxError is caused by a trailing commas in the Error constructor argument list.

This fails in IE11

throw new Error(
      'React-Hot-Loader: `react-hot-loader/root` is not supported on your system. ' +
        'Please use `import {hot} from "react-hot-loader"` instead',
    );

but this works:

throw new Error(
      'React-Hot-Loader: `react-hot-loader/root` is not supported on your system. ' +
        'Please use `import {hot} from "react-hot-loader"` instead'
    );

When I fix it locally, though, I get another error that Promise is undefined which originates here https://github.com/gaearon/react-hot-loader/blob/master/src/global/generation.js#L47

Fair issue. As long as there were just one valid reason to use Object.assign - easy to fix.