Unused CSS Selector warning not appearing

[mustafa0x]

It shows in the REPL, but not when running locally.

[Conduitry]

Weird. I'm seeing this with sveltejs/template, but I haven't looked into whether this is an issue with the compiler (probably not), the rollup plugin, or the template. We can move this issue once we find out who's causing it.

[Conduitry]

It looks like rollup-plugin-svelte is specifically suppressing this warning, and has been for quite a while, which surprised me. I've inquired into what's intended here.

[mcmxcdev]

I think this issue can be closed, just verified that it reports any unused styles.

[mustafa0x]

I'm still not getting warnings.

{
  "devDependencies": {
    "npm-run-all": "^4.1.5",
    "rollup": "^2.18.1",
    "rollup-plugin-commonjs": "^10.1.0",
    "rollup-plugin-livereload": "^1.3.0",
    "rollup-plugin-node-resolve": "^5.2.0",
    "rollup-plugin-svelte": "^5.2.3",
    "rollup-plugin-terser": "^6.1.0",
    "sirv-cli": "^1.0.2",
    "svelte-routing": "^1.4.2",
    "svelte": "^3.23.2"
  }
}

[mcmxcdev]

Not sure if that is the actual problem, but you are using some outdated packages:

"@rollup/plugin-commonjs": "^13.0.0",
"@rollup/plugin-node-resolve": "^8.1.0"

These rollup dependencies switched to scoped package naming, so you are actually behind my 3 major versions.

[mustafa0x]

Thanks, didn't help though. I also tried now with a fresh instance of svelte-template.

[Bravilogy]

@mustafa0x Hi, did you figure this out? I have the same exact issue here..

[mustafa0x]

No, I didn't. I still don't get any warnings.

[mustafa0x]

Line of code that is causing this:
https://github.com/sveltejs/rollup-plugin-svelte/blob/master/index.js#L255

The issue where Rich clarifies the motivation:
#17

The PR where the code was committed.
#22

So, in light of the above it seems this error was supposed to be silenced only css: false.

Edit: seems like this commit is what caused this error to always be silenced:
1b541b3#diff-1fdf421c05c1140f6d71444ea2b27638L133

[Bravilogy]

@mustafa0x thank you, that's very helpful! I was just starting to dig into the code myself. :)