refactor[core]: use webpack-dev-server now (#355)

* bump deps: update vue-splitpane version

* refactor[chore]: use webpack-dev-serve build

* perf:settings

* doc: uodate readme

build/utils.js

@@ -1,35 +1,38 @@
-var path = require('path')
-var config = require('../config')
-var ExtractTextPlugin = require('extract-text-webpack-plugin')
+'use strict'
+const path = require('path')
+const config = require('../config')
+const ExtractTextPlugin = require('extract-text-webpack-plugin')
+const packageConfig = require('../package.json')
 
 exports.assetsPath = function (_path) {
-  var assetsSubDirectory = process.env.NODE_ENV === 'production'
+  const assetsSubDirectory = process.env.NODE_ENV === 'production'
     ? config.build.assetsSubDirectory
     : config.dev.assetsSubDirectory
+
   return path.posix.join(assetsSubDirectory, _path)
 }
 
 exports.cssLoaders = function (options) {
   options = options || {}
 
-  var cssLoader = {
+  const cssLoader = {
     loader: 'css-loader',
     options: {
-      minimize: process.env.NODE_ENV === 'production',
       sourceMap: options.sourceMap
     }
   }
 
-  var postcssLoader = {
+  const postcssLoader = {
     loader: 'postcss-loader',
     options: {
-      sourceMap: true
+      sourceMap: options.sourceMap
     }
   }
 
   // generate loader string to be used with extract text plugin
   function generateLoaders (loader, loaderOptions) {
-    var loaders = options.usePostCSS !== false ? [cssLoader, postcssLoader] : [cssLoader]
+    const loaders = options.usePostCSS ? [cssLoader, postcssLoader] : [cssLoader]
+
     if (loader) {
       loaders.push({
         loader: loader + '-loader',
@@ -65,14 +68,34 @@ exports.cssLoaders = function (options) {
 
 // Generate loaders for standalone style files (outside of .vue)
 exports.styleLoaders = function (options) {
-  var output = []
-  var loaders = exports.cssLoaders(options)
-  for (var extension in loaders) {
-    var loader = loaders[extension]
+  const output = []
+  const loaders = exports.cssLoaders(options)
+
+  for (const extension in loaders) {
+    const loader = loaders[extension]
     output.push({
       test: new RegExp('\\.' + extension + '$'),
       use: loader
     })
   }
+
   return output
 }
+
+exports.createNotifierCallback = () => {
+  const notifier = require('node-notifier')
+
+  return (severity, errors) => {
+    if (severity !== 'error') return
+
+    const error = errors[0]
+    const filename = error.file && error.file.split('!').pop()
+
+    notifier.notify({
+      title: packageConfig.name,
+      message: severity + ': ' + error.name,
+      subtitle: filename || '',
+      icon: path.join(__dirname, 'logo.png')
+    })
+  }
+}