"Uncaught Error: [HMR] Hot Module Replacement is disabled." appearing when adding special entry point

I’m using webpack for tota11y and absolutely loving it, but I keep running into a problem with HMR and my config.

Following the instructions at http://webpack.github.io/docs/webpack-dev-server.html#hot-mode, I’ve added webpack/hot/dev-server as an entry point. Running

webpack-dev-server --hot

Everything works as expected, but the problem comes when I build with webpack -p. In doing so, I get the following error when running my bundle in a browser:

Uncaught Error: [HMR] Hot Module Replacement is disabled.

Grepping through my bundle I can see that error message, but why is this hot reloading code in my bundle?

I’ve since removed that bit from the entry field in my config, and hot reloading seems to work fine. So I remain a bit confused: do I not actually need webpack/hot/dev-server in my config? Are the docs outdated?

I checked around for this error but couldn’t find anything, so perhaps my problem runs deeper than that.

[sokra]

The docs are wrong… 😢

Just use webpack-dev-server --hot --inline and don’t anything special about webpack-dev-server or HMR to your webpack.config.js.

[sokra]

Hot Module Replacement is disabled. means the HotModuleReplacementPlugin is not used.

--hot adds it. (because the CLI have access to your webpack configuration)

hot: true doesn’t add it. (because the API doesn’t have access to your webpack configuration)