From 2e34df923ebf8a2ddc9e407840360a6c4a46a7f0 Mon Sep 17 00:00:00 2001
From: Adam Wathan <adam.wathan@gmail.com>
Date: Fri, 30 Mar 2018 10:23:56 -0400
Subject: [PATCH] Add sourcemaps for replaced preflight styles

---
 src/lib/substituteTailwindAtRules.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/lib/substituteTailwindAtRules.js b/src/lib/substituteTailwindAtRules.js
index 70cdaa10ce79..c03dbbace5db 100644
--- a/src/lib/substituteTailwindAtRules.js
+++ b/src/lib/substituteTailwindAtRules.js
@@ -13,9 +13,13 @@ export default function(config) {
 
     css.walkAtRules('tailwind', atRule => {
       if (atRule.params === 'preflight') {
-        atRule.before(
-          postcss.parse(fs.readFileSync(`${__dirname}/../../css/preflight.css`, 'utf8'))
+        const preflightTree = postcss.parse(
+          fs.readFileSync(`${__dirname}/../../css/preflight.css`, 'utf8')
         )
+
+        preflightTree.walk(node => (node.source = atRule.source))
+
+        atRule.before(preflightTree)
         atRule.remove()
       }