Re: [whatwg/encoding] Editorial: make ISO-2022-JP encoder perform error state switch (#236)

@hsivonen commented on this pull request.



> @@ -2938,8 +2943,17 @@ and <var>code point</var>, runs these steps:
   <p class=note>If <var>pointer</var> is non-null, it is less than 8836 due to the nature of
   <a>index jis0208</a> and the <a>index pointer</a> operation.
 
- <li><p>If <var>pointer</var> is null, return <a>error</a> with
- <var>code point</var>.
+ <li>
+  <p>If <var>pointer</var> is null, then:
+
+  <ol>
+   <li><p>If <a>ISO-2022-JP encoder state</a> is <a lt="ISO-2022-JP encoder jis0208">jis0208</a>,

Please document (for non-browser users of the spec) that callers of the abstraction are responsible for emitting a replacement byte sequence that only uses the bytes that have the ASCII interpretation in the Roman state of ISO-2022-JP.

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