webpacker: Command "webpack-dev-server" not found.

I’m trying to create a new project with webpacker in rails and I constantly get the error

yarn run v0.24.6
error Command "webpack-dev-server" not found.

When trying to launch the dev server.

Run down of the commands:

rails new testapp--webpack
./bin/rails webpacker:install:vue
./bin/webpack-dev-server
yarn run v0.24.6
error Command "webpack-dev-server" not found.

System configuration

Rails: 5.1.1
Ruby: 2.4.1p111
Node: v6.10.2
Yarn: v0.24.6
OS: Ubuntu 16.10

I’m also running this on a Vagrant machine with the version 1.9.3

I tried doing:

$ sudo npm install -g webpack-dev-server
$ npm install (from the rails project folder)
$ yarn
$  ./bin/yarn install

Nothing seems to work. Any help?

Thanks!

About this issue

Original URL
State: closed
Created 7 years ago
Reactions: 17
Comments: 52 (23 by maintainers)

Commits related to this issue

webpack or webpack-dev-server not found (#516) * webpack or webpack-dev-server not found Add to troubleshooting of readme to prevent such issues https://github.com/rails/webpacker/issues/379#issue... — committed to rails/webpacker by ytbryan 7 years ago
webpack or webpack-dev-server not found (#516) * webpack or webpack-dev-server not found Add to troubleshooting of readme to prevent such issues https://github.com/rails/webpacker/issues/379#issue... — committed to sensiblegame/webpack by sensiblegame 7 years ago
Resolve Broken Webpacker Issue Install webpacker in dependencies instead of devDependencies per https://github.com/rails/webpacker/issues/506#issuecomment-455878837 — committed to MAPC/trailmap3 by mzagaja 5 years ago
webpack or webpack-dev-server not found (#516) * webpack or webpack-dev-server not found Add to troubleshooting of readme to prevent such issues https://github.com/rails/webpacker/issues/379#issue... — committed to KingTiger001/Rails-web-pack-project by KingTiger001 7 years ago
webpack or webpack-dev-server not found (#516) * webpack or webpack-dev-server not found Add to troubleshooting of readme to prevent such issues https://github.com/rails/webpacker/issues/379#issue... — committed to smartech7/ruby-webpacker by ytbryan 7 years ago

Most upvoted comments

Thanks @ytbryan. @luispcosta as suggested could you please re-run bundle exec rails webpacker:install and see if ./bin/webpack-dev-server works for you?

+32

gauravtiwari on Jun 18, 2017

I was missing a package.json file, which wasn’t getting initialized when I ran rails webpacker:install.

Running yarn init, then rails webpacker:install added these dependencies:

  "dependencies": {
    "@rails/webpacker": "3.5"
  },
  "devDependencies": {
    "webpack-dev-server": "2.11.2"
  }

and then bin/webpack-dev-server worked.

christiangenco on Sep 10, 2018

I had this same problem (randomly - on a project that had been working fine for months) - I think it had something to do with npm messing up my node_modules.

Running bundle exec rails webpacker:install and clicking n to every suggestion worked fine for me.

tarr11 on Aug 16, 2017

for me command yarn did the trick.

gsum on Mar 4, 2019

@hovancik Could you please remove node_modules folder and do yarn install?

gauravtiwari on Aug 21, 2017

@luispcosta you should do rails:webpacker:install

Because rails new testapp--webpack there is a missing space

Therefore, rails:webpacker:install not called. Therefore you don’t have a config/webpack.

ytbryan on Jun 18, 2017

I was missing a package.json file, which wasn’t getting initialized when I ran rails webpacker:install.

Running yarn init, then rails webpacker:install added these dependencies:
  "dependencies": {
    "@rails/webpacker": "3.5"
  },
  "devDependencies": {
    "webpack-dev-server": "2.11.2"
  }
and then bin/webpack-dev-server worked.

That worked fine to me, Thanks. What’s the login here? I’m using rails 5.2.2 and I thought rails:webpacker:install was supposed to do all the job.

diegocharles on Jan 20, 2019

@luispcosta Is webpacker installed i.e. config/webpack exists and all node_modules are bundled? Check node_modules folder please.

gauravtiwari on Jun 15, 2017

@frenangomes Yes if you have run bundle exec rails webpacker:install it should add that automatically for you. Perhaps the command exited prematurely due to an underlying error with node or yarn version. Could you check that please, trying running this command again - bundle exec rails webpacker:install?

gauravtiwari on Jul 25, 2017