build: unignore webpack config

Author: jedwards1211

.gitignore

@@ -7,3 +7,4 @@ node_modules
 /*.js
 /*.js.flow
 !/.babelrc.js
+!/webpack.config.js

webpack.config.js

@@ -0,0 +1,80 @@
+'use strict'
+
+/* eslint-env node */
+
+const webpack = require('webpack')
+const path = require('path')
+const ProgressPlugin = require('webpack/lib/ProgressPlugin')
+const env = process.env.NODE_ENV
+const isTest = env === 'test'
+const isProd = env === 'production'
+
+const plugins = [
+  new webpack.DefinePlugin({
+    'process.env.NODE_ENV': JSON.stringify(env),
+  }),
+  new ProgressPlugin({ profile: false }),
+]
+
+const externals = isTest
+  ? {
+      cheerio: 'window',
+      'react/addons': true,
+      'react/lib/ExecutionEnvironment': true,
+      'react/lib/ReactContext': true,
+    }
+  : {}
+
+module.exports = {
+  mode: isProd ? 'production' : 'development',
+  devtool: isTest ? 'source-map' : 'eval',
+  output: isTest
+    ? {
+        library: 'reactViewSlider',
+        libraryTarget: 'umd',
+      }
+    : {
+        path: path.join(__dirname, 'demo'),
+        filename: 'bundle.js',
+      },
+  plugins,
+  resolve: {
+    alias: {
+      'react-view-slider': path.join(__dirname, 'src'),
+    },
+  },
+  module: {
+    rules: [
+      {
+        loader: 'babel-loader',
+        exclude: /node_modules/,
+        options: {
+          cacheDirectory: true,
+          plugins: [
+            '@babel/plugin-transform-flow-strip-types',
+            '@babel/plugin-syntax-dynamic-import',
+            '@babel/plugin-proposal-export-default-from',
+            '@babel/plugin-proposal-export-namespace-from',
+            '@babel/plugin-proposal-object-rest-spread',
+            '@babel/plugin-proposal-class-properties',
+          ],
+          presets: [
+            ['@babel/preset-env', { targets: { browsers: 'last 2 versions' } }],
+            '@babel/preset-react',
+            '@babel/preset-flow',
+          ],
+        },
+        test: /\.js$/,
+      },
+    ],
+  },
+  externals,
+}
+
+if (!isTest) {
+  module.exports.entry = ['@babel/polyfill', './demo/index.js']
+  module.exports.devServer = {
+    port: 3000,
+    contentBase: path.join(__dirname, 'demo'),
+  }
+}