Getting Postcss warning without using it - npm

Question

I'm getting this Postcss warning:
You did not set any plugins, parser, or stringifier. Right now, PostCSS does nothing. Pick plugins for your case on https://www.postcss.parts/ and use them in postcss.config.js. (repeated 19 times)
But I'm not using it. It's very annoying because, as you can see, the message is repeated several times.
I know why I'm getting the error (I don't have a Postcss config file or any plugins, stringifiers, etc, set) but I don't know why is Postcss installed in first place.
This is my package.json
{
"name": "vip-english-website",
"version": "1.0.0",
"private": true,
"scripts": {
"dev": "nuxt",
"build": "nuxt build",
"start": "nuxt start"
},
"engines": {
"node": "16.x"
},
"dependencies": {
"#dzangolab/vue-accordion": "^1.2.0",
"#nuxtjs/axios": "^5.13.6",
"express": "^4.17.1",
"googleapis": "^91.0.0",
"vue-carousel": "^0.18.0",
"vue-check-view": "^0.3.0",
"vue-gapi": "^2.0.0",
"vue-js-modal": "^2.0.1",
"vuelidate": "^0.7.6"
},
"devDependencies": {
"#nuxtjs/google-fonts": "^1.3.0",
"core-js": "^3.19.1",
"nuxt": "^2.15.8",
"nuxt-windicss": "^2.0.12"
}
}
Do anyone have any idea?

Answer 1

Is been 3 days of troubleshooting this error, finally the solution in the github discussion works for me.
I'm using the following dependencies
"vue": "^2.6.14",
"vue-server-renderer": "^2.6.14",
"vue-template-compiler": "^2.6.14",
"vuelidate": "^0.7.7",
"vuetify": "^2.6.1",
"webpack": "^4.46.0"
"axios": "^0.27.2",
"core-js": "^3.19.3",
"nuxt": "^2.15.8",
Github Issue - Allow to disable "You did not set any plugins, parser, or stringifier. Right now, PostCSS does nothing. Pick plugins for your case on https://www.postcss.parts/ and use them in postcss.config.js
In nuxt.config.js, under the build options, add the following as shown below. That worked for me.
build: {
postcss: null,
}
Hope it helps

Answer 2

PostCSS is a dependency of Nuxt. You can use npm ls {package_name} command in your project directory, to view package dependencies tree.
Issue was fixed in recent PostCSS release: https://github.com/postcss/postcss/issues/1375 , but Nuxt probably will update it only on next big release (v3).

Answer 3

just add to nuxt.config.js
build: {
postcss: null,
loaders: {
vue: {
prettify: false
}
}
}

Answer 4

I'm using nuxt 2.15.8 & having the same issue.
The following command & config will supress the warning.
npm i -D #nuxt/postcss8 #nuxtjs/style-resources
In nuxt.config.js, edit/add:
buildModules: [
'#nuxtjs/style-resources',
'#nuxt/postcss8',
],
build: {
postcss: {
plugins: {
},
preset: {
}
}
}

Answer 5

In my case using Nuxt, I not only needed to add the following code to the Nuxt config to disable the warning, but also to actually make the autoprefixer work! (even if the autoprefixer comes by default in Nuxt and a .browserlistrc file exists)
build: {
postcss: {
preset: {
autoprefixer: {
overrideBrowserslist: ['last 3 versions', '> 1%']
}
}
}
}
After a fresh Nuxt install I had the warning, and playing around with newer CSS rules, I noticed that without the above config, filter: grayscale(100%); would not get autoprefixed.
Editing the .browserlistrc file did not help.

Answer 6

For me it solved using npm install inside the project that presented these warnings. Maybe it works for someone else