From dd9c94e47e20ea402c158aa63b439ac07161af8f Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Thu, 7 Feb 2019 14:54:14 +0900
Subject: [PATCH] Update CONTRIBUTING.md

---
 CONTRIBUTING.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4dd9b6ad02..473e92b505 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -44,3 +44,15 @@ Stands for _**S**ervice**W**orker_.
 
 #### Denyaize
 Nyaizeを解除すること
+
+## Code style
+### Don't use `export default`
+Bad:
+``` ts
+export default function(foo: string): string {
+```
+
+Good:
+``` ts
+export function something(foo: string): string {
+```
-- 
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