Webpack-dev-server: Can't resolve 'sockjs-client' in webpack-dev-server 2.6.0

[vincent-cm]

ERROR in (webpack)-dev-server/client/socket.js
Module not found: Error: Can't resolve 'sockjs-client' in '.../node_modules/webpack-dev-server/client'
@ (webpack)-dev-server/client/socket.js 1:13-37
@ (webpack)-dev-server/client?http://0.0.0.0:8888
@ multi (webpack)-dev-server/client?http://0.0.0.0:8888 ./src/polyfills.browser.ts

[SpaceK33z]

Does this also happen in the previous version?

[vincent-cm]

Closed upgrade to 2.6.1

[rubencodes]

This happens to me in 2.7.1 (though it worked in 2.6.1)

Running:
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[zskovacs]

It happened to me as well when i upgraded from 2.6.1 to 2.7.1.
You should try to delete the node_modules folder and run npm install again. It solved the problem for me.

[rubencodes]

This worked, thanks!

[paviad]

It worked for me as well, but I'm curious why does deleting node_modules sometimes help? Where's the bug hiding?

[AlexTo]

Deleting "node_modules" and "npm install" doesn't work for me. But clearing cache before "npm install" works. Here are the steps

1. Delete node_modules
2. npm cache clear --force
3. npm install

I tried several times with only step 1 and 3 with no luck until I tried to clear cache then install. Somehow, npm messed up my cache too :(

[TaylorPzreal]

Same v2.8.2,
delete node_modules
and npm i

[acusti]

Quick note for those on node v8.x: I also had to delete my package-lock.json file (in addition to node_modules) before running npm install

[aykutyararbas]

Added "sockjs-client": "^1.1.4",

It has the dist folder and js.

[ghost]

@aykutyararbas your suggestion did the trick for me.

[aykutyararbas]

@charliebrink Wonderful!

[goofballLogic]

I had to chmod 777 the file in question :(