From 36edba382db5f80b216e579e63c0f8879145199c Mon Sep 17 00:00:00 2001
From: ruanyf <yifeng.ruan@gmail.com>
Date: Wed, 8 Jun 2016 09:02:42 +0800
Subject: [PATCH] =?UTF-8?q?docs(async):=20async=20=E8=AF=AD=E6=B3=95?=
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---
 docs/async.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/docs/async.md b/docs/async.md
index 0c9bdce..de79809 100644
--- a/docs/async.md
+++ b/docs/async.md
@@ -877,6 +877,21 @@ f()
 // hello world
 ```
 
+另一种方法是`await`后面的Promise对象再跟一个`catch`方面，处理前面可能出现的错误。
+
+```javascript
+async function f() {
+  await Promise.reject('出错了')
+    .catch(e => console.log(e));
+  return await Promise.resolve('hello world');
+}
+
+f()
+.then(v => console.log(v))
+// 出错了
+// hello world
+```
+
 （4）如果`await`后面的异步操作出错，那么等同于`async`函数返回的Promise对象被`reject`。
 
 ```javascript