Reproducing a bug when following the nuxt web worker example with nuxt 2.8.1
My flawless Nuxt.js project
# install dependencies
$ npm run install
# serve with hot reload at localhost:3000
$ npm run dev
# build for production and launch server
$ npm run build
$ npm run start
# generate static project
$ npm run generate
For detailed explanation on how things work, check out Nuxt.js docs.