fix #50

example/src/App.vue

@@ -33,7 +33,6 @@ Vue.use
 export default class AppComponent extends Vue {
     msg: string = 'Welcome to Vue-Sweetalert2 example'
 
-
     simple() {
         this.$swal('Hello world!');
     }

example/webpack.config.js

@@ -1,10 +1,11 @@
-var path = require('path')
-var webpack = require('webpack')
-var HtmlWebpackPlugin = require('html-webpack-plugin')
+const path = require('path')
+const webpack = require('webpack')
+const HtmlWebpackPlugin = require('html-webpack-plugin')
 const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
 const { VueLoaderPlugin } = require('vue-loader')
 
-var is_production = (process.env.NODE_ENV === 'production');
+// const is_production = (process.env.NODE_ENV === 'production');
+const is_production = false; // for DEMO
 
 module.exports = {
     entry: './src/main.ts',
@@ -14,6 +15,7 @@ module.exports = {
         filename: 'build.js'
     },
     mode: is_production ? 'production' : 'development',
+    devtool: is_production ? false : 'cheap-eval-source-map',
     module: {
         rules: [
             // Vue

src/index.ts

@@ -28,17 +28,13 @@ class VueSweetalert2 {
             ...options
         };
 
-        if (options.includeCss === false) {
+        if (options.includeCss !== false) {
             require('sweetalert2/dist/sweetalert2.min.css');
         }
 
-        // adding a global method or property
-        let _swal: VueSwalInstance;
-
-        _swal = options ? Swal.mixin(options).fire.bind(Swal) : Swal.fire.bind(Swal);
-
-        // Object.assign(_swal, Swal);
+        const _swal = options ? Swal.mixin(options).fire.bind(Swal) : Swal.fire.bind(Swal);
 
+        // adding a global method or property
         Vue['swal'] = _swal;
 
         // add the instance method