webpack 4 has shipped!
Remember to use this in concert with the webpack 4. To see a working example take a look at the "vanilla" example.
There's more! You may like to use the
<a href="https://github.com/Realytics/fork-ts-checker-webpack-plugin">fork-ts-checker-webpack-plugin</a>, (aka the ts-loader turbo-booster). The webpack compatible version has been released to npm as 0.4.1:
To see a working example take a look at the "fork-ts-checker" example.