From 309d31a5b1a84007708d41cbee88397b0f139aec Mon Sep 17 00:00:00 2001
From: leMaik <an@maik.tk>
Date: Thu, 1 Mar 2018 21:27:59 +0100
Subject: [PATCH] Add sideEffects to the package json for webpack 4.

---
 __tests__/testIcons.js   | 2 --
 __tests__/testPackage.js | 8 ++++++++
 generate-module.js       | 1 +
 package.json             | 1 +
 4 files changed, 10 insertions(+), 2 deletions(-)
 create mode 100644 __tests__/testPackage.js

diff --git a/__tests__/testIcons.js b/__tests__/testIcons.js
index 2c84770..0251265 100644
--- a/__tests__/testIcons.js
+++ b/__tests__/testIcons.js
@@ -5,8 +5,6 @@ import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider'
 import * as commonjsIcons from '../package/index'
 import * as es2015Icons from '../package/index.es'
 
-console.log('hi')
-
 describe('the generated commonjs module', () => {
   it('should export icons that render to SVGs', () => {
     for (const iconName of Object.keys(commonjsIcons)) {
diff --git a/__tests__/testPackage.js b/__tests__/testPackage.js
new file mode 100644
index 0000000..3ecc3a2
--- /dev/null
+++ b/__tests__/testPackage.js
@@ -0,0 +1,8 @@
+/* eslint-env jest */
+
+describe('the npm package', () => {
+  it('should set sideEffects to false to allow webpack to optimize re-exports', () => {
+    const packageJson = require('../package/package.json')
+    expect(packageJson.sideEffects).toBe(false)
+  })
+})
diff --git a/generate-module.js b/generate-module.js
index 8cbd708..1fd79dd 100755
--- a/generate-module.js
+++ b/generate-module.js
@@ -112,6 +112,7 @@ fse.writeFileSync(path.join(__dirname, 'package', 'package.json'), JSON.stringif
   'main',
   'module',
   'jsnext:main',
+  'sideEffects',
   'repository',
   'keywords',
   'author',
diff --git a/package.json b/package.json
index 9b386ad..40e12d7 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "main": "./index.js",
   "module": "./index.es.js",
   "jsnext:main": "./index.es.js",
+  "sideEffects": false,
   "repository": {
     "type": "git",
     "url": "git+https://github.com/TeamWertarbyte/mdi-material-ui.git"