Autoprefixer is only active for .vue files

[fvsch]

This seems to be the same bug as #85, which was closed because, I quote, "Autoprefixer is in the latest template release", but we don't get Autoprefixer working for CSS or SCSS files outside of .vue components.

Steps to reproduce:

vue init webpack postcss-test && cd postcss-test
npm install
npm install node-sass sass-loader --save-dev

Then create a few test stylesheets:

/* src/assets/test1.css */
.test1 { display: flex; }

// src/assets/test2.scss
.test2 { display: flex; }

Finally, let's test a few ways to load these:

1. As entry points:

// build/webpack.base.conf.js
...
module.exports = {
  entry: {
    app: './src/main.js',
    test1: './src/assets/test1.css',
    test2: './src/assets/test2.scss'
  },
  ...
}

Then npm run build. Results:

/* dist/static/css/test1.ca0cd0e2b1b09d965f5ce5c21f1fc6e7.css */
.test1{display:flex}

/* dist/static/css/test2.4d716aeffa93f62596ef617b3129561c.css */
.test2{display:flex}

2. As JS imports:

<!-- src/App.vue -->
<script>
import {} from './assets/test1.css'
import {} from './assets/test2.scss'
...
</script>

(Remove the entry points test before.) Then npm run build. Result:

/* dist/static/css/app.4006533b8ed715dfd365cdd7a0b4f7be.css */
.test1,.test2{display:flex}

3. In style tags in components:

<!-- src/App.vue -->
<style>
@import './assets/test1.css';
.test1b { display: flex; }
</style>

<style lang="scss">
@import './assets/test2.scss';
.test2b { display: flex; }
</style>

Result:

/* dist/static/css/app.6c438b7dca17522bb707d18112b8cbcb.css */
.test1{display:flex}.test1b,.test2,.test2b{display:-webkit-box;display:-ms-flexbox;display:flex}

Conclusion: Autoprefixer is only used for style tags inside .vue components.
When using Sass or SCSS syntax and an external Sass/SCSS stylesheet, this can be used to apply Autoprefixer to code stored outside of components; the same trick does not work for CSS imports.

Was #85 closed based on a faulty assumption?

As a side note, debugging this issue proved difficult (for several team members) because this template comes with references to autoprefixer and postcss in two locations:

• package.json -> "browserslist" entry
• .postcssrc.js

But the config in config and build never references these locations, postcss or autoprefixer. It's all happening by magic, but only in very limited settings.

Maybe the brower list and postcss config should be moved to build/vue-loader.conf.js, if it only applies to vue-loader? As it is, it's sending the message that it's a project-wide config, but in practice it doesn't seem to be.

[fvsch]

Possible duplicate of: #544
(I don't read Chinese but it seems similar.)

[cycold]

Yeah, I have the problem too. I have to add postcss-loader to loaders

Note: need to yarn add postcss-loader -D

[matheusgrieger]

Got this problem as well. Importing any SCSS file, though loads them correctly, does not autoprefix them.

But above solution by @cycold works like a charm, thank you!

[ozguruysal]

Yes the solution from @cycold works great. However you get a warning pointing to https://github.com/postcss/postcss-loader#sourcemap if you have sourceMap set to false in config/index.js that is the default setting.

Would be nice if this feature came out of the box as it's kinda expected result.

[KagamiChan]

In @cycold 's code other loaders are pushed to the loaders array, resulting something like [cssLoader, postcssLoader, ...otherStyleLoader], so I try inserting postcssLoader at last place.

EDIT: my code is not correct.

Any further developments to this? I have to suppport IE10.... :(
Getting the same sourcemap issues as @cycold has stated.

[gluons]

@KagamiChan Your code seems incorrect. @cycold is right. postcss-loader shouldn't be added at the last.

From postcss-loader's docs:

Use it after css-loader and style-loader, but before other preprocessor loaders like e.g sass|less|stylus-loader, if you use any.

[KagamiChan]

@gluons agreed, you're right, edited my code

[hanzhenlong]

@cycold I tried the solution but did not work

anyone can help? tks

[diachedelic]

I ran vue init webpack my-project just now, and was able to reproduce @fvsch 's 3rd example:

<!-- src/App.vue -->
<style>
@import './assets/test1.css';
.test1b { display: flex; }
</style>

<style lang="scss">
@import './assets/test2.scss';
.test2b { display: flex; }
</style>

Result:

.test1{
  display:flex
}

.test1b,
.test2,
.test2b{
  display:-webkit-box;
  display:-ms-flexbox;
  display:flex
}

This is an issue for using 3rd party Vue components which import plain css.

[LinusBorg]

Hm, that's weird. Postcss is active for .css files since yesterday, so airport fixer should be applied. I will check this out.