From 0acba737d28d03f8ac7fdf8821c2bdb4427ea840 Mon Sep 17 00:00:00 2001
From: HaNdTriX <HaNdTriX@users.noreply.github.com>
Date: Fri, 17 Aug 2018 20:28:48 +0200
Subject: [PATCH] Fix server key warning (#4973)

The current canary version shows the following warning in development mode:

```log
Warning: Each child in an array or iterator should have a unique "key" prop. See https://fb.me/react-warning-keys for more information.
    in script
    in NextScript
    in body
    in html
    in Document
```

This PR adds proper keys to the devFiles on the server.

Related https://github.com/zeit/next.js/pull/4954
---
 server/document.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/document.js b/server/document.js
index 7e1dcf3487331..0f74b1c77cf9d 100644
--- a/server/document.js
+++ b/server/document.js
@@ -204,7 +204,7 @@ export class NextScript extends Component {
     const pagePathname = getPagePathname(pathname)
 
     return <Fragment>
-      {devFiles ? devFiles.map((file) => <script src={`${assetPrefix}/_next/${file}`} nonce={this.props.nonce} />) : null}
+      {devFiles ? devFiles.map((file) => <script key={file} src={`${assetPrefix}/_next/${file}`} nonce={this.props.nonce} />) : null}
       {staticMarkup ? null : <script nonce={this.props.nonce} dangerouslySetInnerHTML={{
         __html: NextScript.getInlineScriptSource(this.context._documentProps)
       }} />}