vue webpack 2 autoprefixer for ie9+

Using Vue generated from Vuecli with the webpack build. There's a lot of magic going on. What I can't figure out is how to generate the vendor prefixes needed for IE.

This was copied from github issue: https://github.com/vuejs-templates/webpack/issues/421#issuecomment-284322065

vue-loader.conf.js

var utils = require('./utils')
var config = require('../config')
var isProduction = process.env.NODE_ENV === 'production'
 
module.exports = {
  loaders: utils.cssLoaders({
    sourceMap: isProduction
      ? config.build.productionSourceMap
      : config.dev.cssSourceMap,
    extract: isProduction
  }),
  postcss: [
    require('postcss-import')(),
    require('autoprefixer')({
      browsers: ['ie >= 9']
    })
  ]
}

Simple container component example

container/index.vue

<template>
    <div class="container">
        <slot></slot>
    </div>
</template>
<script>
    import './index.scss'
    export default {}
</script>

container/index.scss

// this is aliased in webpack.base.conf
@import "~styles/base-config";

.container {
  @include grid(); // this generates display:flex and border-box resets
  max-width: 100%;
  margin: 0 auto;
}

Expected inline output generated in the head, (but currently don't get -ms-flexbox or -webkit- prefixes )

<style> 
.container {
   -webkit-box-sizing: border-box; // not generated
   box-sizing: border-box; 
   display: -webkit-box;  // not generated
   display: -ms-flexbox; // not generated
   display: flex;
   max-width: 100%;
   margin: 0 auto;
}
</style>

Related:

1. webpack2 vue-cli autoprefixer not work in js file when require scss file？

2. https://github.com/vuejs/vue-cli/issues/350 Just uses autoprefixer in vue-loader.conf.js with last 2 versions ( I used browsers: ['ie >= 9'], didn't work )

3. Potential solution: https://github.com/vuejs-templates/webpack/issues/600 However getting source map errors in the console.

Added to build/utils.js

// npm install postcss-loader first then edit:
...
  var postcssLoader = {
    loader : 'postcss-loader'
  }

  // generate loader string to be used with extract text plugin
  function generateLoaders (loader, loaderOptions) {
    var loaders = [cssLoader, postcssLoader]
    if (loader) {
      loaders.push({
        loader: loader + '-loader',
        options: Object.assign({}, loaderOptions, {
          sourceMap: options.sourceMap
        })
      })
    }
...

Update 26-07-2017

Added repo here: https://github.com/sidouglas/vue-js-vendor-prefixes-bug

Update 03-08-2017

@Chris Camaratta

npm ERR! fetch failed http://remote-server/artifactory/api/npm/npm-aggregator/vue/-/vue-2.4.2.tgz
npm WARN retry will retry, error on last attempt: Error: getaddrinfo ENOTFOUND uscavs-repo1 remote-server
npm ERR! fetch failed http://remote-server/artifactory/api/npm/npm-aggregator/vue-router/-/vue-router-2.7.0.tgz
npm WARN retry will retry, error on last attempt: Error: getaddrinfo ENOTFOUND uscavs-repo1 remote-server
cloneCurrentTree: WARN retry will retry, error on last attempt: Error: getaddrinfo ENOTFOUND uscavs-repo1 remote-server
[2]  + 56232 suspended  npm i