Subtle Tweak to get Boostrap 4 Working With Webpack

bootstrap-4-webpack-config.md

Although I followed the excellent directions provided by the Boostrap 4 documentation, I found it incomplete. Here are the missing steps:

# install dependencies
npm i jquery popper.js bootstrap@4.0.0-beta --save

# install dev-dependencies
npm i precss --save-dev

# use the following webpack postcss-loader config
{
  loader: 'postcss-loader', // Run post css actions
  options: {
    sourceMap: true, // if other loaders generate sourceMap file(s)
    plugins: function () { // post css plugins, can be exported to postcss.config.js
      return [
        require('precss'),
        require('autoprefixer')
      ];
    }
  }
}