webpack@1.x

在webpack.config.js文件下，

vue: {
    postcss: [require('autoprefixer')({ browsers: ['last 10 Chrome versions', 'last 5 Firefox versions', 'Safari >= 6', 'ie > 8'] })]
  },
  plugins:[]

webpack@2.x

在webpack.config.js文件下，

rules: [{
            test: /\.vue$/,
            loader: 'vue-loader',
            options: {
                // vue-loader options go here
                postcss: [require('autoprefixer')({ browsers: ['last 10 Chrome versions', 'last 5 Firefox versions', 'Safari >= 6', 'ie > 8'] })]
            }
        }