Re: [w3c/IndexedDB] Specify the error code for failures when reading a value from disk (PR #430)

@inexorabletash requested changes on this pull request.



> @@ -5636,13 +5643,17 @@ To <dfn>store a record into an object store</dfn> with
 To <dfn>retrieve a value from an object store</dfn> with
 |targetRealm|, |store| and |range|, run these steps:
 
+NOTE:
+    May return a {{DOMException}} if an error occurs while running these steps.

Avoid "may" as that has [RFC 2119](https://datatracker.ietf.org/doc/html/rfc2119) meaning, i.e. it means that the specified behavior is optional for implementations. Also, it should be normative.

https://infra.spec.whatwg.org/#algorithm-declaration has the preferred formulation, which is:

> ..., perform the following steps. They return ...

So maybe:

> ... run these steps. They return a value from the object store, or an error (a DOMException).


> @@ -5654,6 +5665,9 @@ To <dfn>retrieve a value from an object store</dfn> with
 To <dfn>retrieve multiple values from an object
 store</dfn> with |targetRealm|, |store|, |range| and optional |count|, run these steps:
 
+NOTE:

Same as above.

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