Export the properties people will need

Author: domenic

index.bs

@@ -5294,8 +5294,9 @@ compared to the quota value.
 of the <a href="#idl-DOMException-error-names">base <code>DOMException</code> error names</a>. It
 has been upgraded to a full interface to support including such information.</p>
 
-Every {{QuotaExceededError}} instance has a <dfn for="QuotaExceededError">requested</dfn> and a
-<dfn for="QuotaExceededError">quota</dfn>, both numbers or null. They are both initially null.
+Every {{QuotaExceededError}} instance has a <dfn export for="QuotaExceededError">requested</dfn> and
+a <dfn export for="QuotaExceededError">quota</dfn>, both numbers or null. They are both initially
+null.
 
 <div algorithm>
     The <dfn constructor for="QuotaExceededError" lt="QuotaExceededError(message, options)">new QuotaExceededError(|message|, |options|)</dfn>