When using the example set-up the error highlighting stops working. So the red underscore and tooltip with error message aren't shown anymore. Up to v0.10.1 it is working. It's the same issue as #477 which was closed without resolution, and looks similar to #493.
v0.10.1

after update to v0.10.2

Am I missing a dependency here?
<script src="https://cdnjs.cloudflare.com/ajax/libs/es6-promise/4.1.1/es6-promise.auto.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fetch/2.0.3/fetch.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.6.1/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.6.1/react-dom.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/graphiql/0.11.2/graphiql.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/graphiql/0.11.2/graphiql.min.js"></script>
Hi @oliemansm - I just ran GraphiQL example app and was able to see all of the features working correctly. You also mention of version 0.10.2, but from your imports I see 0.11.2 - did you put an incorrect version perhaps?
@asiandrummer I've also run in to the syntax underline check, and it repros on a fresh clone, npm run build and npm run dev of master.

@joshjcarrier Thanks for verifying!
@asiandrummer I've tried multiple versions, and seen the same behavior starting with 0.10.2 up to the latest 0.11.2. I copied the last try, that's all. Sorry for the confusion.
Thanks guys! I'm taking a look at this right now.
@oliemansm @joshjcarrier https://github.com/graphql/codemirror-graphql/releases/tag/v0.6.11 takes care of this bug - I'll let greenkeeper update to this revision. Thanks again for reporting!
@asiandrummer did greenkeeper pick up this revision? I see yarn.lock still on the old version.
@joshjcarrier. Right you are, looks like it needs an update.
Most helpful comment
@oliemansm @joshjcarrier https://github.com/graphql/codemirror-graphql/releases/tag/v0.6.11 takes care of this bug - I'll let greenkeeper update to this revision. Thanks again for reporting!