According to implementation-defined processing

Sounds better than from an implementation-defined processing, and is
already used elsewhere.

Author: ptomato

index.html

@@ -4391,14 +4391,14 @@ <h1><span class="secnum">4.1.4</span> IsValidEraYearForCalendar ( <var>calendar<
     <emu-clause id="sec-temporal-calendardateera" type="abstract operation" aoid="CalendarDateEra">
       <h1><span class="secnum">4.1.5</span> CalendarDateEra ( <var>calendar</var>, <var>date</var> )</h1>
       <p>The abstract operation CalendarDateEra takes arguments <var>calendar</var> (a <emu-xref href="#sec-ecma402-calendar-types" id="_ref_20"><a href="#sec-ecma402-calendar-types">calendar type</a></emu-xref> that is not <emu-val>"iso8601"</emu-val>) and <var>date</var> (a Temporal.PlainDateTime, Temporal.PlainDate, or Temporal.PlainYearMonth) and returns a String or <emu-val>undefined</emu-val>. It performs <emu-xref href="#implementation-defined"><a href="https://tc39.es/ecma262/#implementation-defined">implementation-defined</a></emu-xref> processing to find the era for the date corresponding to <var>date</var> in the context of the calendar represented by <var>calendar</var> and returns a lowercase String value representing that era, or <emu-val>undefined</emu-val> for calendars that do not have eras. It performs the following steps when called:</p>
-      <emu-alg><ol><li>If <emu-xref aoid="CalendarSupportsEra" id="_ref_21"><a href="#sec-temporal-calendarsupportsera">CalendarSupportsEra</a></emu-xref>(<var>calendar</var>) is <emu-val>false</emu-val>, return <emu-val>undefined</emu-val>.</li><li>Let <var>era</var> be the String to indicate the era corresponding to <var>date</var> in the context of the calendar represented by <var>calendar</var> from an <emu-xref href="#implementation-defined"><a href="https://tc39.es/ecma262/#implementation-defined">implementation-defined</a></emu-xref> processing.</li><li>Return <emu-xref aoid="CanonicalizeEraInCalendar" id="_ref_22"><a href="#sec-temporal-canonicalizeeraincalendar">CanonicalizeEraInCalendar</a></emu-xref>(<var>calendar</var>, <var>era</var>).</li></ol></emu-alg>
+      <emu-alg><ol><li>If <emu-xref aoid="CalendarSupportsEra" id="_ref_21"><a href="#sec-temporal-calendarsupportsera">CalendarSupportsEra</a></emu-xref>(<var>calendar</var>) is <emu-val>false</emu-val>, return <emu-val>undefined</emu-val>.</li><li>Let <var>era</var> be the String to indicate the era corresponding to <var>date</var> in the context of the calendar represented by <var>calendar</var> according to <emu-xref href="#implementation-defined"><a href="https://tc39.es/ecma262/#implementation-defined">implementation-defined</a></emu-xref> processing.</li><li>Return <emu-xref aoid="CanonicalizeEraInCalendar" id="_ref_22"><a href="#sec-temporal-canonicalizeeraincalendar">CanonicalizeEraInCalendar</a></emu-xref>(<var>calendar</var>, <var>era</var>).</li></ol></emu-alg>
     </emu-clause>
 
     <emu-clause id="sec-temporal-calendardateerayear" type="abstract operation" aoid="CalendarDateEraYear">
       <h1><span class="secnum">4.1.6</span> CalendarDateEraYear ( <var>calendar</var>, <var>date</var> )</h1>
       <p>The abstract operation CalendarDateEraYear takes arguments <var>calendar</var> (a <emu-xref href="#sec-ecma402-calendar-types" id="_ref_23"><a href="#sec-ecma402-calendar-types">calendar type</a></emu-xref> that is not <emu-val>"iso8601"</emu-val>) and <var>date</var> (a Temporal.PlainDateTime, Temporal.PlainDate, or Temporal.PlainYearMonth) and returns an <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref> or <emu-val>undefined</emu-val>. It performs <emu-xref href="#implementation-defined"><a href="https://tc39.es/ecma262/#implementation-defined">implementation-defined</a></emu-xref> processing to find the era for the date corresponding to <var>date</var> in the context of the calendar represented by <var>calendar</var> and returns an <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref> representing the ordinal position of the year of <var>date</var> in that era, or <emu-val>undefined</emu-val> for calendars that do not have eras. It performs the following steps when called:</p>
       
-      <emu-alg><ol><li>If <emu-xref aoid="CalendarSupportsEra" id="_ref_24"><a href="#sec-temporal-calendarsupportsera">CalendarSupportsEra</a></emu-xref>(<var>calendar</var>) is <emu-val>false</emu-val>, return <emu-val>undefined</emu-val>.</li><li>Let <var>eraYear</var> be the <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref> to indicate the era year corresponding to <var>date</var> in the context of the calendar represented by <var>calendar</var> from an <emu-xref href="#implementation-defined"><a href="https://tc39.es/ecma262/#implementation-defined">implementation-defined</a></emu-xref> processing.</li><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>eraYear</var> is an <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref>.</li><li>Return <var>eraYear</var>.</li></ol></emu-alg>
+      <emu-alg><ol><li>If <emu-xref aoid="CalendarSupportsEra" id="_ref_24"><a href="#sec-temporal-calendarsupportsera">CalendarSupportsEra</a></emu-xref>(<var>calendar</var>) is <emu-val>false</emu-val>, return <emu-val>undefined</emu-val>.</li><li>Let <var>eraYear</var> be the <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref> to indicate the era year corresponding to <var>date</var> in the context of the calendar represented by <var>calendar</var> according to <emu-xref href="#implementation-defined"><a href="https://tc39.es/ecma262/#implementation-defined">implementation-defined</a></emu-xref> processing.</li><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>eraYear</var> is an <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref>.</li><li>Return <var>eraYear</var>.</li></ol></emu-alg>
       <emu-note><span class="note">Note</span><div class="note-contents">
         Era years are 1-indexed for many calendars, but not all (e.g., the eras of the Burmese calendar each start with a year 0). Years can also advance opposite the flow of time (as for BCE years in the Gregorian calendar).
       </div></emu-note>

spec.emu

@@ -545,7 +545,7 @@ contributors: Google, Ecma International
       </dl>
       <emu-alg>
         1. If CalendarSupportsEra(_calendar_) is *false*, return *undefined*.
-        1. Let _era_ be the String to indicate the era corresponding to _date_ in the context of the calendar represented by _calendar_ from an implementation-defined processing.
+        1. Let _era_ be the String to indicate the era corresponding to _date_ in the context of the calendar represented by _calendar_ according to implementation-defined processing.
         1. Return CanonicalizeEraInCalendar(_calendar_, _era_).
       </emu-alg>
     </emu-clause>
@@ -564,7 +564,7 @@ contributors: Google, Ecma International
       </dl>
       <emu-alg>
         1. If CalendarSupportsEra(_calendar_) is *false*, return *undefined*.
-        1. Let _eraYear_ be the integer to indicate the era year corresponding to _date_ in the context of the calendar represented by _calendar_ from an implementation-defined processing.
+        1. Let _eraYear_ be the integer to indicate the era year corresponding to _date_ in the context of the calendar represented by _calendar_ according to implementation-defined processing.
         1. Assert: _eraYear_ is an integer.
         1. Return _eraYear_.
       </emu-alg>