Handle runtime errors

[nkzawa]

• display runtime errors on console and/or browsers.
• recover with hot-code reloading

[fdidron]

Hi,

I have been using this on my webpack configs for a while, I think it's a nice way to display errors + build status

https://github.com/geowarin/friendly-errors-webpack-plugin

It would handle this #206 as well

[rauchg]

wow that's pretty amazing @fdidron!

[fdidron]

I was able to add this fairly easily to next. I can make a PR if you want

[rauchg]

My god, everything about that gif is beautiful @fdidron. Your themes, and the CLI output of course :D

[rauchg]

Please make that PR!

[fdidron]

Here you go !