From de934844e2c12a2383c2a7ab2d3b43b0b9c8180e Mon Sep 17 00:00:00 2001
From: "Xin Du (Clark)" <clark.duxin@gmail.com>
Date: Sat, 19 Oct 2019 09:23:57 +0100
Subject: [PATCH] fix(webpack): enable devtool for dev mode (#6495)

---
 packages/webpack/src/config/base.js   | 4 ----
 packages/webpack/src/config/client.js | 4 ++++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/packages/webpack/src/config/base.js b/packages/webpack/src/config/base.js
index 0a9425b672f3..40c0728bee51 100644
--- a/packages/webpack/src/config/base.js
+++ b/packages/webpack/src/config/base.js
@@ -135,10 +135,6 @@ export default class WebpackBaseConfig {
     return fileName
   }
 
-  get devtool () {
-    return false
-  }
-
   env () {
     const env = {
       'process.env.NODE_ENV': JSON.stringify(this.mode),
diff --git a/packages/webpack/src/config/client.js b/packages/webpack/src/config/client.js
index 1c6ecda007d3..243e7dab6072 100644
--- a/packages/webpack/src/config/client.js
+++ b/packages/webpack/src/config/client.js
@@ -19,6 +19,10 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
     this.isModern = false
   }
 
+  get devtool () {
+    return this.dev ? 'cheap-module-eval-source-map' : false
+  }
+
   getFileName (...args) {
     if (this.buildContext.buildOptions.analyze) {
       const [key] = args