webpack/webpack-cli

Unknown option '--watch' in 4.5.0

sporto opened this issue · 7 comments

sporto commented

Describe the bug

In version 4.4.0 this works fine

webpack serve --watch

After upgrading to 4.5.0 we get:

[webpack-cli] Error: Unknown option '--watch'

What is the current behavior?

CLI shows error [webpack-cli] Error: Unknown option '--watch'
And dev server fails to run.

To Reproduce

Run webpack serve --watch

Expected behavior

Run the dev server without error

snitin315 commented

Don't use --watch with serve it doesn't make any sense.

  • 👍2
sporto commented

@snitin315 What should I use instead?
With serve --watch the bundle rebuilds on changes. Without it doesn't.

snitin315 commented

webpack serve is sufficient it should rebuild after changes.

sporto commented

@snitin315 it doesn't without --watch as least in 4.4.0. Is this changed in 4.5.0?

sporto commented

Ok, this is a problem with the loader we are using https://github.com/elm-community/elm-webpack-loader
It expects that flag to watch files.
I can confirm that other files like CSS and Typescript work fine without that flag.

  • 👍1
sporto commented

I have been trying to fix this loader. But I'm not familiar on how to build webpack loaders.

I can see that this loader uses compiler.options.watch, to watch files.
https://github.com/elm-community/elm-webpack-loader/blob/master/index.js#L103

I have tried using the webpack serve and printing the compiler.options. watch is always false when using the dev server.
The doc says that watch is on by default.

Is this the right way to do a loader these days? Using compiler.options.watch? Can you point me in the right direction? Thanks

alexander-akait commented

you can use compiler.watching to detect watch (webpack@5)