From fb3664b006d07b8f029b2a9cb5cb877b3d216e5e Mon Sep 17 00:00:00 2001
From: Stephen Rugh <sirugh@users.noreply.github.com>
Date: Tue, 20 Aug 2019 14:00:28 -0500
Subject: [PATCH] Use eval-source-map instead of cheap-source-map for devtool
 (#1581)

---
 packages/pwa-buildpack/lib/WebpackTools/configureWebpack.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/pwa-buildpack/lib/WebpackTools/configureWebpack.js b/packages/pwa-buildpack/lib/WebpackTools/configureWebpack.js
index b1d8f65d94..b858b5affa 100644
--- a/packages/pwa-buildpack/lib/WebpackTools/configureWebpack.js
+++ b/packages/pwa-buildpack/lib/WebpackTools/configureWebpack.js
@@ -269,7 +269,10 @@ async function configureWebpack({ context, vendor = [], special = {}, env }) {
         });
 
         if (isDevServer()) {
-            config.devtool = 'cheap-source-map';
+            // Using eval-source-map shows original source (non-transpiled) as
+            // well as comments.
+            // See https://webpack.js.org/configuration/devtool/
+            config.devtool = 'eval-source-map';
 
             await PWADevServer.configure(
                 {