From c2fb88b11aceb9effed2b7d8e85f109495d2edbc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dandelion=20Man=C3=A9?= <dl@dandelion.io>
Date: Tue, 8 May 2018 11:50:52 -0700
Subject: [PATCH] Turn on flow for index.js

Test plan: `yarn travis` passes
---
 src/plugins/artifact/editor/index.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/plugins/artifact/editor/index.js b/src/plugins/artifact/editor/index.js
index 8614d5b..3ef8d8d 100644
--- a/src/plugins/artifact/editor/index.js
+++ b/src/plugins/artifact/editor/index.js
@@ -1,9 +1,13 @@
-// @no-flow
+// @flow
 import React from "react";
 import ReactDOM from "react-dom";
 import "./index.css";
 import App from "./App";
 import registerServiceWorker from "./registerServiceWorker";
 
-ReactDOM.render(<App />, document.getElementById("root"));
+const root = document.getElementById("root");
+if (root == null) {
+  throw new Error("Unable to find root element!");
+}
+ReactDOM.render(<App />, root);
 registerServiceWorker();