From 44f017770f38e5df4543deda40b42c132122d56d Mon Sep 17 00:00:00 2001
From: Eduard Kyvenko <eduard.kyvenko@gmail.com>
Date: Tue, 10 Oct 2017 22:53:21 +0200
Subject: [PATCH 1/3] feat($config): Enable users to disable dead code
 elimination by setting `DEAD_CODE_ELIMINATION` to `

---
 config/webpack.config.prod.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/config/webpack.config.prod.js b/config/webpack.config.prod.js
index 0897dbcf..20941efd 100644
--- a/config/webpack.config.prod.js
+++ b/config/webpack.config.prod.js
@@ -187,7 +187,8 @@ module.exports = {
     new UglifyJsPlugin({
       compress: {
         warnings: false,
-        dead_code: true,
+        // Enable users to turn off dead code elimination.
+        dead_code: process.env.DEAD_CODE_ELIMINATION !== 'false',
         pure_funcs: [
           '_elm_lang$core$Native_Utils.update',
           'A2',

From d5fd36fef4cbe5619162a6b4b3153a102d36b31d Mon Sep 17 00:00:00 2001
From: Eduard Kyvenko <eduard.kyvenko@gmail.com>
Date: Thu, 26 Oct 2017 17:50:30 +0200
Subject: [PATCH 2/3] feat: Dead code elimination is disabled by default

Added an opinionated config for performing dead code elimination, which could be enabled by setting
`DEAD_CODE_ELIMINATION` environment variable to `true`
---
 config/webpack.config.prod.js | 57 ++++++++++++++++++++---------------
 1 file changed, 33 insertions(+), 24 deletions(-)

diff --git a/config/webpack.config.prod.js b/config/webpack.config.prod.js
index 20941efd..d3b592fe 100644
--- a/config/webpack.config.prod.js
+++ b/config/webpack.config.prod.js
@@ -37,6 +37,33 @@ const extractTextPluginOptions = shouldUseRelativeAssetPaths
     { publicPath: Array(cssFilename.split('/').length).join('../') }
   : {};
 
+// Enable users to turn off dead code elimination.
+const deadCodeElimination =
+  process.env.DEAD_CODE_ELIMINATION !== 'true'
+    ? {
+        dead_code: true,
+        pure_funcs: [
+          '_elm_lang$core$Native_Utils.update',
+          'A2',
+          'A3',
+          'A4',
+          'A5',
+          'A6',
+          'A7',
+          'A8',
+          'A9',
+          'F2',
+          'F3',
+          'F4',
+          'F5',
+          'F6',
+          'F7',
+          'F8',
+          'F9'
+        ]
+      }
+    : {};
+
 module.exports = {
   // Don't attempt to continue if there are any errors.
   bail: true,
@@ -185,30 +212,12 @@ module.exports = {
 
     // Minify the compiled JavaScript.
     new UglifyJsPlugin({
-      compress: {
-        warnings: false,
-        // Enable users to turn off dead code elimination.
-        dead_code: process.env.DEAD_CODE_ELIMINATION !== 'false',
-        pure_funcs: [
-          '_elm_lang$core$Native_Utils.update',
-          'A2',
-          'A3',
-          'A4',
-          'A5',
-          'A6',
-          'A7',
-          'A8',
-          'A9',
-          'F2',
-          'F3',
-          'F4',
-          'F5',
-          'F6',
-          'F7',
-          'F8',
-          'F9'
-        ]
-      },
+      compress: Object.assign(
+        {
+          warnings: false
+        },
+        deadCodeElimination
+      ),
       output: {
         comments: false
       }

From a7493be646832b24a1d84cb5e451e489cef723ae Mon Sep 17 00:00:00 2001
From: Eduard Kyvenko <eduard.kyvenko@gmail.com>
Date: Fri, 27 Oct 2017 10:43:32 +0200
Subject: [PATCH 3/3] docs: Added docs about dead code elimination

---
 template/README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/template/README.md b/template/README.md
index ea91c764..37b1b496 100644
--- a/template/README.md
+++ b/template/README.md
@@ -20,6 +20,7 @@ You can find the most recent version of this guide [here](https://github.com/hal
     - [make](#make)
     - [reactor](#reactor)
 - [Turning on/off Elm Debugger](#turning-onoff-elm-debugger)
+- [Dead code elimination](#dead-code-elimination)
 - [Changing the Page `<title>`](#changing-the-page-title)
 - [Adding a Stylesheet](#adding-a-stylesheet)
 - [Post-Processing CSS](#post-processing-css)
@@ -168,6 +169,12 @@ By default, in production (`elm-app build`) the Debugger is turned off and in de
 
 To turn on/off Elm Debugger explicitly, set `ELM_DEBUGGER` environment variable to `true` or `false` respectively.
 
+## Dead code elimination
+
+Create Elm App comes with an opinionated setup for dead code elimination which is disabled by default, because it may break your code.
+
+You can enable it by setting `DEAD_CODE_ELIMINATION` environment variable to `true`
+
 ## Changing the base path of the assets in the HTML
 
 By default, assets will be linked from the HTML to the root url. For example `/css/style.css`.