Re: [heycam/webidl] Integrate with the resizable buffers proposal (#982)

@syg commented on this pull request.



> +creates a new IDL type that allows the buffer source type to be backed by an ECMAScript
+{{ECMAScript/ArrayBuffer}} that is resizable, instead of only by a fixed-length {{ECMAScript/ArrayBuffer}}.
+
+If the [{{AllowResizable}}] [=extended attribute=] and the [{{AllowShared}}] [=extended attribute=] both appear on one of the [=buffer source types=], it
+creates a new IDL type that allows the buffer source type to be additionally backed by an ECMAScript
+{{ECMAScript/SharedArrayBuffer}} that is growable.
+
+The [{{AllowResizable}}] extended attribute must [=takes no arguments|take no arguments=].
+
+A type that is not a [=buffer source type=] must not be
+[=extended attributes associated with|associated with=] the [{{AllowResizable}}] extended attribute.
+
+See the rules for converting ECMAScript values to IDL [=buffer source types=] in
+[[#es-buffer-source-types]] for the specific requirements that the use of [{{AllowResizable}}] entails.
+
+<div class="example">

Since the extended attributes are alpha-sorted, I think I'll move the mega-example down to the [AllowShared] section and link to it from the [AllowResizable] section.

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