title: How to set dialogDefaultMaxWidth in Office UI Fabric React?
body: <p>The dialog component of Fabric has <strong>dialogDefaultMaxWidth</strong> set to '340px' by default according to its <a href="https://developer.microsoft.com/en-us/fabric?example=sd#/components/dialog#Implementation" rel="nofollow noreferrer">docs</a>. I want to change it to '640px' but I'm not sure how to do that. The docs are explaining everything using <em>Typescript</em> so I'm getting a little confused as I have no knowledge of the language. All I know is <em>Javascript</em>.</p>