domenic commented on this pull request.
> - <a>payment method identifiers</a> given <var>identifiers</var>.
- For each resulting payment handler, if payment method specific
- capabilities supplied by the payment handler match those provided
- by <var>data</var>, the payment handler matches.
+ <li>Let <var>data</var> be the result of <a data-cite=
+ "!ECMA-262-2015#sec-json.parse">JSON-parsing</a> the second
+ element in <var>paymentMethod</var> tuple.
+ </li>
+ <li>If required by the specification that defines the
+ <var>identifer</var>, then <a data-cite=
+ "!WEBIDL#dfn-convert-ecmascript-to-idl-value">convert</a>
+ <var>data</var> to an IDL value. Otherwise, <a data-cite=
+ "!WEBIDL#dfn-convert-ecmascript-to-idl-value">convert</a> to
+ <a data-cite="!WEBIDL#idl-object">object</a>.
+ </li>
+ <li>If conversion results in an error, reject
What does "discard" mean? That's not a well-defined operation, on tuples or anything else...
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