Normalize negative zero

index.bs

@@ -6408,6 +6408,9 @@ steps may throw an exception.
       : If [=ECMAScript/Type=](|input|) is Number
       ::
           1. If |input| is NaN then return invalid.
+
+          1. If |input| is -0 (negative zero), then return a new [=/key=] with [=key/type=] *number* and [=key/value=] 0 (zero).
+
           1. Otherwise, return a new [=/key=] with
               [=key/type=] *number* and [=key/value=]
               |input|.
@@ -6784,6 +6787,7 @@ For the revision history of the second edition, see [that document's Revision Hi
 * Added <a href="#accessibility">Accessibility considerations</a> section. ([Issue #327](https://github.com/w3c/IndexedDB/issues/327))
 * Used [[infra]]'s list sorting definition. ([Issue #346](https://github.com/w3c/IndexedDB/issues/346))
 * Added a definition for [=transaction/live=] transactions, and renamed "run an upgrade transaction" to [=/upgrade a database=], to disambiguate "running". ([Issue #408](https://github.com/w3c/IndexedDB/issues/408))
+* Added normalization for negative zero for keys. ([Issue #375](https://github.com/w3c/IndexedDB/issues/375))
 
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 # Acknowledgements # {#acknowledgements}