From 179dc83b31398f5c9f67b2358228db72d7fa58bb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=B3=A2=E6=AF=94=E5=B0=8F=E9=87=91=E5=88=9A?=
 <2890636389@qq.com>
Date: Wed, 12 Jun 2019 11:27:36 +0800
Subject: [PATCH] chrome wired bug.

fixed [#104](https://github.com/cxs-css/cxs/issues/104).
---
 src/index.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/index.js b/src/index.js
index 9a8312e0..f04064d0 100644
--- a/src/index.js
+++ b/src/index.js
@@ -6,6 +6,7 @@ const hyph = s => s.replace(/[A-Z]|^ms/g, '-$&').toLowerCase()
 const mx = (rule, media) => media ? `${media}{${rule}}` : rule
 const rx = (cn, prop, val) => `.${cn}{${hyph(prop)}:${val}}`
 const noAnd = s => s.replace(/&/g, '')
+const isDev = (process.env.NODE_ENV === 'development') || (!process.env.NODE_ENV)
 
 const parse = (obj, child = '', media) =>
   Object.keys(obj).map(key => {
@@ -47,7 +48,11 @@ if (typeof document !== 'undefined') {
   ).sheet
   insert = rule => {
     rules.push(rule)
-    sheet.insertRule(rule, sheet.cssRules.length)
+    try{
+      sheet.insertRule(rule, rule.includes('@import') ? 0 : sheet.cssRules.length)
+    }catch(e){
+      if (isDev) console.warn('whoops, illegal rule inserted', rule)
+    }
   }
 }