From 066053c8b7ee35f8ed7fc50babf2964ee73afec3 Mon Sep 17 00:00:00 2001
From: Sibiraj <20282546+sibiraj-s@users.noreply.github.com>
Date: Mon, 5 Aug 2019 13:54:46 +0530
Subject: [PATCH] Set jsonpFunction to prevent conflicts (#5951)

---
 packages/react-scripts/config/webpack.config.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/react-scripts/config/webpack.config.js b/packages/react-scripts/config/webpack.config.js
index 4b62f3d8a28..7ecb8a2a683 100644
--- a/packages/react-scripts/config/webpack.config.js
+++ b/packages/react-scripts/config/webpack.config.js
@@ -39,6 +39,8 @@ const getCacheIdentifier = require('react-dev-utils/getCacheIdentifier');
 // @remove-on-eject-end
 const postcssNormalize = require('postcss-normalize');
 
+const appPackageJson = require(paths.appPackageJson);
+
 // Source maps are resource heavy and can cause out of memory issue for large source files.
 const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
 // Some apps do not need the benefits of saving a web request, so not inlining the chunk
@@ -189,6 +191,9 @@ module.exports = function(webpackEnv) {
               .replace(/\\/g, '/')
         : isEnvDevelopment &&
           (info => path.resolve(info.absoluteResourcePath).replace(/\\/g, '/')),
+      // Prevents conflicts when multiple Webpack runtimes (from different apps)
+      // are used on the same page.
+      jsonpFunction: `webpackJsonp${appPackageJson.name}`,
     },
     optimization: {
       minimize: isEnvProduction,
@@ -197,7 +202,7 @@ module.exports = function(webpackEnv) {
         new TerserPlugin({
           terserOptions: {
             parse: {
-              // we want terser to parse ecma 8 code. However, we don't want it
+              // We want terser to parse ecma 8 code. However, we don't want it
               // to apply any minification steps that turns valid ecma 5 code
               // into invalid ecma 5 code. This is why the 'compress' and 'output'
               // sections only apply transformations that are ecma 5 safe