Sass loader hangs compilation - node.js

Question

I am using webpack version 2.2.0 and sass-loader 4.4.1, and #angular/core is 2.4.4
when I run the command : npm run serve it make hang command prompt on 62% sometimes 61% or 63%.
Here below id dev dependencies of package.json:
"devDependencies": {
"#types/core-js": "0.9.35",
"#types/googlemaps": "3.26.2",
"#types/node": "6.0.60",
"#types/uglify-js": "2.0.27",
"angular2-template-loader": "0.4.0",
"awesome-typescript-loader": "2.2.4",
"copy-webpack-plugin": "3.0.1",
"css-loader": "0.25.0",
"exports-loader": "0.6.3",
"file-loader": "0.9.0",
"html-webpack-plugin": "2.26.0",
"imports-loader": "0.6.5",
"json-loader": "0.5.4",
"metrojs": "0.9.77",
"napa": "2.3.0",
"node-sass": "4.2.0",
"raw-loader": "0.5.1",
"resolve-url-loader": "1.6.1",
"rimraf": "2.5.4",
"sass-loader": "4.1.1",
"sass-to-js": "1.3.0",
"source-map-loader": "0.1.6",
"style-loader": "0.13.1",
"ts-helpers": "1.1.2",
"typedoc": "0.4.5",
"typescript": "2.0.2",
"url-loader": "0.5.7",
"webpack": "2.2.0",
"webpack-dashboard": "0.2.1",
"webpack-dev-middleware": "1.9.0",
"webpack-dev-server": "2.2.0",
"webpack-md5-hash": "0.0.5",
"webpack-merge": "2.4.0"
},
Here below is code of webpack.common.js file.
const webpack = require('webpack');
const helpers = require('./helpers');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ForkCheckerPlugin = require('awesome-typescript-loader').ForkCheckerPlugin;
const ContextReplacementPlugin = require('webpack/lib/ContextReplacementPlugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const METADATA = {
title: 'Azimuth - Angular 2 Admin Template',
description: 'Admin template based on Angular 2, Bootstrap 4 and Webpack',
baseUrl: './'
};
module.exports = {
entry: {
'polyfills': './src/polyfills.ts',
'vendor': './src/vendor.ts',
'main': './src/main.ts'
},
resolve:{
extensions: ['.js', '.ts', '.css', '.scss', '.json'],
modules: [helpers.root('src'), 'node_modules']
},
module: {
loaders:[
{
test: /\.ts$/,
loaders: [
'awesome-typescript-loader',
'angular2-template-loader'
],
exclude: [/\.(spec|e2e)\.ts$/]
},
{
test: /\.json$/,
loader: 'json-loader'
},
{
test: /\.css$/,
loader: 'raw-loader'
},
{
test: /\.scss$/,
loaders: ['raw-loader', 'sass-loader'] // here if i comment sass-loader then worked.
},
{
test: /initial\.scss$/,
loader: ExtractTextPlugin.extract({
fallbackLoader: 'style-loader',
loader: 'css-loader!sass-loader?sourceMap'
})
},
{
test: /\.woff(2)?(\?v=.+)?$/,
loader: 'url-loader?limit=10000&mimetype=application/font-woff&name=fonts/[name].[ext]'
},
{
test: /\.(ttf|eot|svg)(\?v=.+)?$/,
loader: 'file-loader?&name=fonts/[name].[ext]'
},
{
test: /bootstrap\/dist\/js\/umd\//,
loader: 'imports?jQuery=jquery'
},
{
test: /\.html$/,
loader: 'raw-loader',
exclude: [helpers.root('src/index.html')]
},
{
test: /\.(png|jpg|gif)$/,
loader: 'file-loader?limit=8192&name=assets/img/[name].[ext]'
}
]
},
plugins:[
new ExtractTextPlugin({filename: 'initial.css', allChunks: true}),
new ForkCheckerPlugin(),
new ContextReplacementPlugin(
/angular(\\|\/)core(\\|\/)(esm(\\|\/)src|src)(\\|\/)linker/,
helpers.root('src')
),
new webpack.optimize.CommonsChunkPlugin({
name: ['polyfills', 'vendor'].reverse()
}),
new CopyWebpackPlugin([{
from: 'src/assets',
to: 'assets'
}]),
new HtmlWebpackPlugin({
title: METADATA.title,
template: 'src/index.html',
chunksSortMode: 'dependency',
metadata: METADATA
}),
new webpack.ProvidePlugin({
jQuery: "jquery",
$: 'jquery',
jquery: 'jquery',
'window.jQuery': 'jquery',
'Tether': 'tether',
'window.Tether': 'tether',
Datamap:'datamaps',
Skycons: 'skycons/skycons',
Dropzone: 'dropzone',
moment: 'moment',
fullCalendar: 'fullcalendar'
})
],
node: {
global: true,
crypto: 'empty',
process: true,
module: false,
clearImmediate: false,
setImmediate: false
}
}
If I do comment sass-loader in
loaders: ['raw-loader', 'sass-loader']
line and use the
loaders: ['raw-loader', 'css-loader', 'style-loader']
then it skips the hang but css does not appear.
I have tried with update all the modules in package.json file but nothing got help with that. I am not sure why it is getting hang. Is there any issue of compatibility in versions or else?