Webpack postcss prefixer in vue-cli 3

Question

I need to prefix the Bulma css classes by using webpack. I found an example but my app uses Vue CLI 3 and I'm not sure how to translate the webpack config to a vue.config.js.

This is the webpack config

In my vue.config.js I have the following:

  chainWebpack: config => {
    config.module
      .rule('css-prefixer')
      .use(['style-loader', 'css-loader'])
      .loader('postcss-loader')
      .tap(options => {
        // Prefixer goes here
        return options
      })
  }

Which gives some internal webpack errors.

bulma doesn't need any special configuration in vue-cli to work correctly. npm install the module, import it in your own .scss file, import that .scss file in your main.js and you're done — Ohgodwhy
Yes I know but I want to prefix all CSS classes that bulma has. Because it uses very generic names such as .label which causes problems when I dynamically load my app into an existing website. — Christiaan Maks
Did you manage to figure it out? Having the same issue as my client's site is using Bootstrap 3.4 and we need to integrate bulma in newer sections. — intosite
I ended up taking the code in the link and generating the prefixed Bulma css with that. Then I just added those to my assets in my Vue project. So Bulma doesn't come from node_modules as I would like but it's good enough. — Christiaan Maks

intosite intosite · Accepted Answer · 2019-04-01T03:29:38

Just manage to do it in my vue.config.js

const path = require('path')
const prefixer = require('postcss-prefixer')

module.exports = {
  css: {
    loaderOptions: {
      postcss: {
        plugins: [
          prefixer({
            prefix: 'b-'
          })
        ]
      }
    }
  }
}

Webpack postcss prefixer in vue-cli 3

1 Answers