Webpack-dev-server: Too many arguments provided

[gotbahn]

Looks like latest changes in 2.5.1 introduced a bug

> webpack-dev-server --progress

YError: Too many arguments provided. Expected max 2 but received 3.
    at module.exports (.../node_modules/yargs/lib/argsert.js:31:13)
    at Object.Yargs.self.alias (.../node_modules/yargs/yargs.js:245:5)
    at module.exports (.../node_modules/webpack/bin/config-yargs.js:12:4)
    at Object.<anonymous> (.../node_modules/webpack-dev-server/bin/webpack-dev-server.js:49:36)

MacOS 10.12.5
webpack v3.1.0
webpack-dev-server v2.5.1

v2.5.0 works fine

[golddranks]

I can confirm this; getting the exact same error.

Using:

webpack v3.1.0
webpack-dev-server v2.5.1

[Alberto2686]

Confirmed with

webpack v3.2.0
webpack-dev-server v2.5.1

The following works:

webpack v3.2.0
webpack-dev-server v2.5.0

[TheKnarf]

I'm replicating this error with the following two lines of code:

const yargs = require("yargs");
require("webpack/bin/config-yargs")(yargs);

name | version
--- | ---
MacOS | 10.12.5
Node | v8.1.3
Npm | 5.0.3

package.json

  "dependencies": {
    "shelljs": "^0.7.8",
    "yargs": "^8.0.2"
  },
  "devDependencies": {
    "webpack": "^3.2.0"
  }

package.lock: https://pastebin.com/twDM8rDX

Trying to write my own command line tool using webpack-dev-server's code for inspiration when I hit upon the same error.

Anyone have any idea how to fix it?

[TheKnarf]

This seems to be the line causing the problem:
alias("help", "h", "?")

https://github.com/webpack/webpack/blob/master/bin/config-yargs.js#L12

[cnkdynamics]

Updated node to 8.5.0. This error "YError: Too many arguments provided. Expected max 2 but received 3." came out. Revert back to 8.4.0 Everything went fine.

[jbenner]

I'm getting the same error after upgrading to Node 8.5.0. Reverting to Node 8.4.0 does not fix it for me. The error seems to be related to the hot reload functionality; when the error is present, webpack-dev-server serves the files and watch/rebuilds correctly, but the hot reload URL that gets polled is a 404.

EDIT: Upgrading to Webpack 3.5.6 fixed this for me

[huangyanxiong01]

the same error

➜  webpack-dev-server --version
webpack-dev-server 2.8.1
webpack 3.5.6
node 8.5

[DenysVuika]

@huangyanxiong01 you might need to delete the "node_modules" and "package-lock.json" and trying again. Works fine for me with your versions.

[evenstensberg]

Downgrade yargs to 6.0.4

[T-Kelani]

This seems to be the line causing the problem:
alias("help", "h", "?")

https://github.com/webpack/webpack/blob/master/bin/config-yargs.js#L12

I have the same reason, and same error. The url you attached is not working though. any new updates regarding this ?