Version

3.0.1

Reproduction link

https://github.com/screendriver/vue-cli-worker-loader-bug

Node and OS info

Node 10.9.0 / yarn 1.9.4 / macOS high sierra

Steps to reproduce

Just do a yarn serve and open http://localhost:8080 in your browser. You can see the error immediately.

What is expected?

Should not throw Uncaught ReferenceError: window is not defined.

What is actually happening?

Throws the error and doesn't work.