From adfc4a18a20dac361e960e6be675a9842a5a502a Mon Sep 17 00:00:00 2001
From: Ben Allen <benallen@igalia.com>
Date: Wed, 7 Aug 2024 12:03:16 -0700
Subject: [PATCH] Bugfix: Display negative sign on leading numeric-style zeroes
 (#207)

---
 index.html | 26 +++++++++++++-------------
 spec.emu   |  6 ++++++
 2 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/index.html b/index.html
index b0f6771..e4f7596 100644
--- a/index.html
+++ b/index.html
@@ -1420,7 +1420,7 @@
 });
 
 let sdoMap = JSON.parse(`{}`);
-let biblio = 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+let biblio = 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 ;let usesMultipage = false</script><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.0.1/styles/base16/solarized-light.min.css"><style>body {
   display: flex;
   word-wrap: break-word;
@@ -2693,7 +2693,7 @@
 </ul></div><div id="menu-toggle"><svg xmlns="http://www.w3.org/2000/svg" style="width:100%; height:100%; stroke:currentColor" viewBox="0 0 120 120">
       <title>Menu</title>
       <path stroke-width="10" stroke-linecap="round" d="M30,60 h60  M30,30 m0,5 h60  M30,90 m0,-5 h60"></path>
-    </svg></div><div id="menu-spacer" class="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins</div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle">◢</span><a href="#durationformat-objects" title="DurationFormat Objects"><span class="secnum">1</span> DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-abstracts" title="Abstract Operations for DurationFormat Objects"><span class="secnum">1.1</span> Abstract Operations for DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-duration-records" title="Duration Records"><span class="secnum">1.1.1</span> Duration Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-tointegerifintegral" title="ToIntegerIfIntegral ( argument )"><span class="secnum">1.1.2</span> ToIntegerIfIntegral ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-todurationrecord" title="ToDurationRecord ( input )"><span class="secnum">1.1.3</span> ToDurationRecord ( <var>input</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-durationsign" title="DurationSign ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds )"><span class="secnum">1.1.4</span> DurationSign ( <var>years</var>, <var>months</var>, <var>weeks</var>, <var>days</var>, <var>hours</var>, <var>minutes</var>, <var>seconds</var>, <var>milliseconds</var>, <var>microseconds</var>, <var>nanoseconds</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvalidduration" title="IsValidDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds )"><span class="secnum">1.1.5</span> IsValidDuration ( <var>years</var>, <var>months</var>, <var>weeks</var>, <var>days</var>, <var>hours</var>, <var>minutes</var>, <var>seconds</var>, <var>milliseconds</var>, <var>microseconds</var>, <var>nanoseconds</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getdurationunitoptions" title="GetDurationUnitOptions ( unit, options, baseStyle, stylesList, digitalBase, prevStyle, twoDigitHours )"><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-addfractionaldigits" title="AddFractionalDigits ( durationFormat, duration )"><span class="secnum">1.1.7</span> AddFractionalDigits ( <var>durationFormat</var>, <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-nextunitfractional" title="NextUnitFractional ( durationFormat, unit )"><span class="secnum">1.1.8</span> NextUnitFractional ( <var>durationFormat</var>, <var>unit</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumerichours" title="FormatNumericHours ( durationFormat, hoursValue, signDisplayed )"><span class="secnum">1.1.9</span> FormatNumericHours ( <var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericminutes" title="FormatNumericMinutes ( durationFormat, minutesValue, hoursDisplayed, signDisplayed )"><span class="secnum">1.1.10</span> FormatNumericMinutes ( <var>durationFormat</var>, <var>minutesValue</var>, <var>hoursDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericseconds" title="FormatNumericSeconds ( durationFormat, secondsValue, minutesDisplayed, signDisplayed )"><span class="secnum">1.1.11</span> FormatNumericSeconds ( <var>durationFormat</var>, <var>secondsValue</var>, <var>minutesDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericunits" title="FormatNumericUnits ( durationFormat, duration, firstNumericUnit, signDisplayed )"><span class="secnum">1.1.12</span> FormatNumericUnits ( <var>durationFormat</var>, <var>duration</var>, <var>firstNumericUnit</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-listformatparts" title="ListFormatParts ( durationFormat, partitionedPartsList )"><span class="secnum">1.1.13</span> ListFormatParts ( <var>durationFormat</var>, <var>partitionedPartsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-partitiondurationformatpattern" title="PartitionDurationFormatPattern ( durationFormat, duration )"><span class="secnum">1.1.14</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-constructor" title="The Intl.DurationFormat Constructor"><span class="secnum">1.2</span> The Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat" title="Intl.DurationFormat ( [ locales [ , options ] ] )"><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var> [ , <var>options</var> ] ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-constructor" title="Properties of the Intl.DurationFormat Constructor"><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype" title="Intl.DurationFormat.prototype"><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.supportedLocalesOf" title="Intl.DurationFormat.supportedLocalesOf ( locales [ , options ] )"><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <var>locales</var> [ , <var>options</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat-internal-slots" title="Internal slots"><span class="secnum">1.3.3</span> Internal slots</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-prototype-object" title="Properties of the Intl.DurationFormat Prototype Object"><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.constructor" title="Intl.DurationFormat.prototype.constructor"><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype-@@tostringtag" title="Intl.DurationFormat.prototype [ @@toStringTag ]"><span class="secnum">1.4.2</span> Intl.DurationFormat.prototype [ @@toStringTag ]</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.format" title="Intl.DurationFormat.prototype.format ( duration )"><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.formatToParts" title="Intl.DurationFormat.prototype.formatToParts ( duration )"><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.resolvedOptions" title="Intl.DurationFormat.prototype.resolvedOptions ( )"><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-intl-durationformat-instances" title="Properties of Intl.DurationFormat Instances"><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">A</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version">Stage 3 Draft / May 23, 2024</h1><h1 class="title">Intl.DurationFormat</h1>
+    </svg></div><div id="menu-spacer" class="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins</div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle">◢</span><a href="#durationformat-objects" title="DurationFormat Objects"><span class="secnum">1</span> DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-abstracts" title="Abstract Operations for DurationFormat Objects"><span class="secnum">1.1</span> Abstract Operations for DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-duration-records" title="Duration Records"><span class="secnum">1.1.1</span> Duration Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-tointegerifintegral" title="ToIntegerIfIntegral ( argument )"><span class="secnum">1.1.2</span> ToIntegerIfIntegral ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-todurationrecord" title="ToDurationRecord ( input )"><span class="secnum">1.1.3</span> ToDurationRecord ( <var>input</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-durationsign" title="DurationSign ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds )"><span class="secnum">1.1.4</span> DurationSign ( <var>years</var>, <var>months</var>, <var>weeks</var>, <var>days</var>, <var>hours</var>, <var>minutes</var>, <var>seconds</var>, <var>milliseconds</var>, <var>microseconds</var>, <var>nanoseconds</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvalidduration" title="IsValidDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds )"><span class="secnum">1.1.5</span> IsValidDuration ( <var>years</var>, <var>months</var>, <var>weeks</var>, <var>days</var>, <var>hours</var>, <var>minutes</var>, <var>seconds</var>, <var>milliseconds</var>, <var>microseconds</var>, <var>nanoseconds</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getdurationunitoptions" title="GetDurationUnitOptions ( unit, options, baseStyle, stylesList, digitalBase, prevStyle, twoDigitHours )"><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-addfractionaldigits" title="AddFractionalDigits ( durationFormat, duration )"><span class="secnum">1.1.7</span> AddFractionalDigits ( <var>durationFormat</var>, <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-nextunitfractional" title="NextUnitFractional ( durationFormat, unit )"><span class="secnum">1.1.8</span> NextUnitFractional ( <var>durationFormat</var>, <var>unit</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumerichours" title="FormatNumericHours ( durationFormat, hoursValue, signDisplayed )"><span class="secnum">1.1.9</span> FormatNumericHours ( <var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericminutes" title="FormatNumericMinutes ( durationFormat, minutesValue, hoursDisplayed, signDisplayed )"><span class="secnum">1.1.10</span> FormatNumericMinutes ( <var>durationFormat</var>, <var>minutesValue</var>, <var>hoursDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericseconds" title="FormatNumericSeconds ( durationFormat, secondsValue, minutesDisplayed, signDisplayed )"><span class="secnum">1.1.11</span> FormatNumericSeconds ( <var>durationFormat</var>, <var>secondsValue</var>, <var>minutesDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericunits" title="FormatNumericUnits ( durationFormat, duration, firstNumericUnit, signDisplayed )"><span class="secnum">1.1.12</span> FormatNumericUnits ( <var>durationFormat</var>, <var>duration</var>, <var>firstNumericUnit</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-listformatparts" title="ListFormatParts ( durationFormat, partitionedPartsList )"><span class="secnum">1.1.13</span> ListFormatParts ( <var>durationFormat</var>, <var>partitionedPartsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-partitiondurationformatpattern" title="PartitionDurationFormatPattern ( durationFormat, duration )"><span class="secnum">1.1.14</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-constructor" title="The Intl.DurationFormat Constructor"><span class="secnum">1.2</span> The Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat" title="Intl.DurationFormat ( [ locales [ , options ] ] )"><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var> [ , <var>options</var> ] ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-constructor" title="Properties of the Intl.DurationFormat Constructor"><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype" title="Intl.DurationFormat.prototype"><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.supportedLocalesOf" title="Intl.DurationFormat.supportedLocalesOf ( locales [ , options ] )"><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <var>locales</var> [ , <var>options</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat-internal-slots" title="Internal slots"><span class="secnum">1.3.3</span> Internal slots</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-prototype-object" title="Properties of the Intl.DurationFormat Prototype Object"><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.constructor" title="Intl.DurationFormat.prototype.constructor"><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype-@@tostringtag" title="Intl.DurationFormat.prototype [ @@toStringTag ]"><span class="secnum">1.4.2</span> Intl.DurationFormat.prototype [ @@toStringTag ]</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.format" title="Intl.DurationFormat.prototype.format ( duration )"><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.formatToParts" title="Intl.DurationFormat.prototype.formatToParts ( duration )"><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.resolvedOptions" title="Intl.DurationFormat.prototype.resolvedOptions ( )"><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-intl-durationformat-instances" title="Properties of Intl.DurationFormat Instances"><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">A</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version">Stage 3 Draft / July 13, 2024</h1><h1 class="title">Intl.DurationFormat</h1>
 <emu-biblio href="./biblio.json"></emu-biblio>
 <emu-clause id="durationformat-objects">
   <h1><span class="secnum">1</span> DurationFormat Objects</h1>
@@ -2850,7 +2850,7 @@ <h1><span class="secnum">1.1.11</span> FormatNumericSeconds ( <var>durationForma
       <h1><span class="secnum">1.1.12</span> FormatNumericUnits ( <var>durationFormat</var>, <var>duration</var>, <var>firstNumericUnit</var>, <var>signDisplayed</var> )</h1>
       <p>The abstract operation FormatNumericUnits takes arguments <var>durationFormat</var> (a DurationFormat Object), <var>duration</var> (a <emu-xref href="#sec-duration-records" id="_ref_29"><a href="#sec-duration-records">Duration Record</a></emu-xref>), <var>firstNumericUnit</var> (a String), and <var>signDisplayed</var> (a Boolean) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref>. It creates a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Lists</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref> containing the formatted parts of <var>duration</var> that use <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val> style according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
 
-      <emu-alg><ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, or <emu-val>"seconds"</emu-val>.</li><li>Let <var>numericPartsList</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>hoursValue</var> be <var>duration</var>.<var class="field">[[Hours]]</var>.</li><li>Let <var>hoursDisplay</var> be <var>durationFormat</var>.<var class="field">[[HoursDisplay]]</var>.</li><li>Let <var>minutesValue</var> be <var>duration</var>.<var class="field">[[Minutes]]</var>.</li><li>Let <var>minutesDisplay</var> be <var>durationFormat</var>.<var class="field">[[MinutesDisplay]]</var>.</li><li>Let <var>secondsValue</var> be <var>duration</var>.<var class="field">[[Seconds]]</var>.</li><li>If <var>duration</var>.<var class="field">[[Milliseconds]]</var> is not 0 or <var>duration</var>.<var class="field">[[Microseconds]]</var> is not 0 or <var>duration</var>.<var class="field">[[Nanoseconds]]</var> is not 0, then<ol><li>Set <var>secondsValue</var> to <var>secondsValue</var> + <emu-xref aoid="AddFractionalDigits" id="_ref_30"><a href="#sec-addfractionaldigits">AddFractionalDigits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>).</li></ol></li><li>Let <var>secondsDisplay</var> be <var>durationFormat</var>.<var class="field">[[SecondsDisplay]]</var>.</li><li>Let <var>hoursFormatted</var> be <emu-val>false</emu-val>.</li><li>If <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val>, then<ol><li>If <var>hoursValue</var> is not 0 or <var>hoursDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Set <var>hoursFormatted</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>secondsValue</var> is not 0 or <var>secondsDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Let <var>secondsFormatted</var> be <emu-val>true</emu-val>.</li></ol></li><li>Else,<ol><li>Let <var>secondsFormatted</var> be <emu-val>false</emu-val>.</li></ol></li><li>Let <var>minutesFormatted</var> be <emu-val>false</emu-val>.</li><li>If <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val> or <var>firstNumericUnit</var> is <emu-val>"minutes"</emu-val>, then<ol><li>If <var>hoursFormatted</var> is <emu-val>true</emu-val> and <var>secondsFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>minutesFormatted</var> to <emu-val>true</emu-val>.</li></ol></li><li>Else if <var>minutesValue</var> is not 0 or <var>minutesDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Set <var>minutesFormatted</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>hoursFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericHours" id="_ref_31"><a href="#sec-formatnumerichours">FormatNumericHours</a></emu-xref>(<var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>If <var>minutesFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericMinutes" id="_ref_32"><a href="#sec-formatnumericminutes">FormatNumericMinutes</a></emu-xref>(<var>durationFormat</var>, <var>minutesValue</var>, <var>hoursFormatted</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>If <var>secondsFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericSeconds" id="_ref_33"><a href="#sec-formatnumericseconds">FormatNumericSeconds</a></emu-xref>(<var>durationFormat</var>, <var>secondsValue</var>, <var>minutesFormatted</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>Return <var>numericPartsList</var>.</li></ol></emu-alg>
+      <emu-alg><ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, or <emu-val>"seconds"</emu-val>.</li><li>Let <var>numericPartsList</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>hoursValue</var> be <var>duration</var>.<var class="field">[[Hours]]</var>.</li><li>Let <var>hoursDisplay</var> be <var>durationFormat</var>.<var class="field">[[HoursDisplay]]</var>.</li><li>Let <var>minutesValue</var> be <var>duration</var>.<var class="field">[[Minutes]]</var>.</li><li>Let <var>minutesDisplay</var> be <var>durationFormat</var>.<var class="field">[[MinutesDisplay]]</var>.</li><li>Let <var>secondsValue</var> be <var>duration</var>.<var class="field">[[Seconds]]</var>.</li><li>If <var>duration</var>.<var class="field">[[Milliseconds]]</var> is not 0 or <var>duration</var>.<var class="field">[[Microseconds]]</var> is not 0 or <var>duration</var>.<var class="field">[[Nanoseconds]]</var> is not 0, then<ol><li>Set <var>secondsValue</var> to <var>secondsValue</var> + <emu-xref aoid="AddFractionalDigits" id="_ref_30"><a href="#sec-addfractionaldigits">AddFractionalDigits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>).</li></ol></li><li>Let <var>secondsDisplay</var> be <var>durationFormat</var>.<var class="field">[[SecondsDisplay]]</var>.</li><li>Let <var>hoursFormatted</var> be <emu-val>false</emu-val>.</li><li>If <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val>, then<ol><li>If <var>hoursValue</var> is not 0 or <var>hoursDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Set <var>hoursFormatted</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>secondsValue</var> is not 0 or <var>secondsDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Let <var>secondsFormatted</var> be <emu-val>true</emu-val>.</li></ol></li><li>Else,<ol><li>Let <var>secondsFormatted</var> be <emu-val>false</emu-val>.</li></ol></li><li>Let <var>minutesFormatted</var> be <emu-val>false</emu-val>.</li><li>If <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val> or <var>firstNumericUnit</var> is <emu-val>"minutes"</emu-val>, then<ol><li>If <var>hoursFormatted</var> is <emu-val>true</emu-val> and <var>secondsFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>minutesFormatted</var> to <emu-val>true</emu-val>.</li></ol></li><li>Else if <var>minutesValue</var> is not 0 or <var>minutesDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Set <var>minutesFormatted</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>hoursFormatted</var> is <emu-val>true</emu-val>, then<ol><li>If <var>signDisplayed</var> is <emu-val>true</emu-val>, then<ol><li>If <var>hoursValue</var> is 0 and <emu-xref aoid="DurationSign" id="_ref_31"><a href="#sec-durationsign">DurationSign</a></emu-xref>(<var>duration</var>.<var class="field">[[Years]]</var>, <var>duration</var>.<var class="field">[[Months]]</var>, <var>duration</var>.<var class="field">[[Weeks]]</var>, <var>duration</var>.<var class="field">[[Days]]</var>, <var>duration</var>.<var class="field">[[Hours]]</var>, <var>duration</var>.<var class="field">[[Minutes]]</var>, <var>duration</var>.<var class="field">[[Seconds]]</var>, <var>duration</var>.<var class="field">[[Milliseconds]]</var>, <var>duration</var>.<var class="field">[[Microseconds]]</var>, <var>duration</var>.<var class="field">[[Nanoseconds]]</var>) is -1, then<ol><li>Set <var>hoursValue</var> to <emu-const>negative-zero</emu-const>.</li></ol></li></ol></li><li>Append <emu-xref aoid="FormatNumericHours" id="_ref_32"><a href="#sec-formatnumerichours">FormatNumericHours</a></emu-xref>(<var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>If <var>minutesFormatted</var> is <emu-val>true</emu-val>, then<ol><li>If <var>signDisplayed</var> is <emu-val>true</emu-val>, then<ol><li>If <var>minutesValue</var> is 0 and <emu-xref aoid="DurationSign" id="_ref_33"><a href="#sec-durationsign">DurationSign</a></emu-xref>(<var>duration</var>.<var class="field">[[Years]]</var>, <var>duration</var>.<var class="field">[[Months]]</var>, <var>duration</var>.<var class="field">[[Weeks]]</var>, <var>duration</var>.<var class="field">[[Days]]</var>, <var>duration</var>.<var class="field">[[Hours]]</var>, <var>duration</var>.<var class="field">[[Minutes]]</var>, <var>duration</var>.<var class="field">[[Seconds]]</var>, <var>duration</var>.<var class="field">[[Milliseconds]]</var>, <var>duration</var>.<var class="field">[[Microseconds]]</var>, <var>duration</var>.<var class="field">[[Nanoseconds]]</var>) is -1, then<ol><li>Set <var>minutesValue</var> to <emu-const>negative-zero</emu-const>.</li></ol></li></ol></li><li>Append <emu-xref aoid="FormatNumericMinutes" id="_ref_34"><a href="#sec-formatnumericminutes">FormatNumericMinutes</a></emu-xref>(<var>durationFormat</var>, <var>minutesValue</var>, <var>hoursFormatted</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>If <var>secondsFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericSeconds" id="_ref_35"><a href="#sec-formatnumericseconds">FormatNumericSeconds</a></emu-xref>(<var>durationFormat</var>, <var>secondsValue</var>, <var>minutesFormatted</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>Return <var>numericPartsList</var>.</li></ol></emu-alg>
     </emu-clause>
 
     <emu-clause id="sec-listformatparts" type="abstract operation" aoid="ListFormatParts">
@@ -2861,11 +2861,11 @@ <h1><span class="secnum">1.1.13</span> ListFormatParts ( <var>durationFormat</va
 
     <emu-clause id="sec-partitiondurationformatpattern" type="abstract operation" aoid="PartitionDurationFormatPattern">
       <h1><span class="secnum">1.1.14</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</h1>
-      <p>The abstract operation PartitionDurationFormatPattern takes arguments <var>durationFormat</var> (a DurationFormat) and <var>duration</var> (a <emu-xref href="#sec-duration-records" id="_ref_34"><a href="#sec-duration-records">Duration Record</a></emu-xref>) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>. It creates and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> with all the corresponding parts according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
+      <p>The abstract operation PartitionDurationFormatPattern takes arguments <var>durationFormat</var> (a DurationFormat) and <var>duration</var> (a <emu-xref href="#sec-duration-records" id="_ref_36"><a href="#sec-duration-records">Duration Record</a></emu-xref>) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>. It creates and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> with all the corresponding parts according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
 
-      <emu-alg><ol><li>Let <var>result</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>signDisplayed</var> be <emu-val>true</emu-val>.</li><li>Let <var>numericUnitFound</var> be <emu-val>false</emu-val>.</li><li>While <var>numericUnitFound</var> is <emu-val>false</emu-val>, repeat for each row in <emu-xref href="#table-partition-duration-format-pattern" id="_ref_2"><a href="#table-partition-duration-format-pattern">Table 2</a></emu-xref> in table order, except the header row:<ol><li>Let <var>value</var> be the value of <var>duration</var>'s field whose name is the Value Field value of the current row.</li><li>Let <var>style</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Style Slot value of the current row.</li><li>Let <var>display</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>If <var>style</var> is <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericUnits" id="_ref_35"><a href="#sec-formatnumericunits">FormatNumericUnits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>, <var>unit</var>, <var>signDisplayed</var>) to <var>result</var>.</li><li>Set <var>numericUnitFound</var> to <emu-val>true</emu-val>.</li></ol></li><li>Else,<ol><li>Let <var>nfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>If <var>unit</var> is <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>If <emu-xref aoid="NextUnitFractional" id="_ref_36"><a href="#sec-nextunitfractional">NextUnitFractional</a></emu-xref>(<var>durationFormat</var>, <var>unit</var>) is <emu-val>true</emu-val>, then<ol><li>Set <var>value</var> to <var>value</var> + <emu-xref aoid="AddFractionalDigits" id="_ref_37"><a href="#sec-addfractionaldigits">AddFractionalDigits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>).</li><li>If <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> is <emu-val>undefined</emu-val>, then<ol><li>Let <var>maximumFractionDigits</var> be <emu-val>9</emu-val><sub>𝔽</sub>.</li><li>Let <var>minimumFractionDigits</var> be <emu-val>+0</emu-val><sub>𝔽</sub>.</li></ol></li><li>Else,<ol><li>Let <var>maximumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li><li>Let <var>minimumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"maximumFractionDigits"</emu-val>, <var>maximumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumFractionDigits"</emu-val>, <var>minimumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"roundingMode"</emu-val>, <emu-val>"trunc"</emu-val>).</li><li>Set <var>numericUnitFound</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>value</var> is not 0 or <var>display</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Let <var>numberingSystem</var> be <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"numberingSystem"</emu-val>, <var>numberingSystem</var>).</li><li>If <var>signDisplayed</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li><li>If <var>value</var> is 0 and <emu-xref aoid="DurationSign" id="_ref_38"><a href="#sec-durationsign">DurationSign</a></emu-xref>(<var>duration</var>.<var class="field">[[Years]]</var>, <var>duration</var>.<var class="field">[[Months]]</var>, <var>duration</var>.<var class="field">[[Weeks]]</var>, <var>duration</var>.<var class="field">[[Days]]</var>, <var>duration</var>.<var class="field">[[Hours]]</var>, <var>duration</var>.<var class="field">[[Minutes]]</var>, <var>duration</var>.<var class="field">[[Seconds]]</var>, <var>duration</var>.<var class="field">[[Milliseconds]]</var>, <var>duration</var>.<var class="field">[[Microseconds]]</var>, <var>duration</var>.<var class="field">[[Nanoseconds]]</var>) is -1, then<ol><li>Set <var>value</var> to <emu-const>negative-zero</emu-const>.</li></ol></li></ol></li><li>Else,<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"signDisplay"</emu-val>, <emu-val>"never"</emu-val>).</li></ol></li><li>Let <var>numberFormatUnit</var> be the NumberFormat Unit value of the current row.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"style"</emu-val>, <emu-val>"unit"</emu-val>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unit"</emu-val>, <var>numberFormatUnit</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unitDisplay"</emu-val>, <var>style</var>).</li><li>Let <var>nf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%NumberFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>nfOpts</var> »).</li><li>Let <var>parts</var> be !&nbsp;<emu-xref aoid="PartitionNumberPattern"><a href="https://tc39.github.io/ecma402/#sec-partitionnumberpattern">PartitionNumberPattern</a></emu-xref>(<var>nf</var>, <var>value</var>).</li><li>Let <var>list</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>part</var> of <var>parts</var>, do<ol><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <var>part</var>.<var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>: <var>part</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <var>numberFormatUnit</var>&nbsp;} to <var>list</var>.</li></ol></li><li>Append <var>list</var> to <var>result</var>.</li></ol></li></ol></li></ol></li><li>Return <emu-xref aoid="ListFormatParts" id="_ref_39"><a href="#sec-listformatparts">ListFormatParts</a></emu-xref>(<var>durationFormat</var>, <var>result</var>).</li></ol></emu-alg>
+      <emu-alg><ol><li>Let <var>result</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>signDisplayed</var> be <emu-val>true</emu-val>.</li><li>Let <var>numericUnitFound</var> be <emu-val>false</emu-val>.</li><li>While <var>numericUnitFound</var> is <emu-val>false</emu-val>, repeat for each row in <emu-xref href="#table-partition-duration-format-pattern" id="_ref_2"><a href="#table-partition-duration-format-pattern">Table 2</a></emu-xref> in table order, except the header row:<ol><li>Let <var>value</var> be the value of <var>duration</var>'s field whose name is the Value Field value of the current row.</li><li>Let <var>style</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Style Slot value of the current row.</li><li>Let <var>display</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>If <var>style</var> is <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericUnits" id="_ref_37"><a href="#sec-formatnumericunits">FormatNumericUnits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>, <var>unit</var>, <var>signDisplayed</var>) to <var>result</var>.</li><li>Set <var>numericUnitFound</var> to <emu-val>true</emu-val>.</li></ol></li><li>Else,<ol><li>Let <var>nfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>If <var>unit</var> is <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>If <emu-xref aoid="NextUnitFractional" id="_ref_38"><a href="#sec-nextunitfractional">NextUnitFractional</a></emu-xref>(<var>durationFormat</var>, <var>unit</var>) is <emu-val>true</emu-val>, then<ol><li>Set <var>value</var> to <var>value</var> + <emu-xref aoid="AddFractionalDigits" id="_ref_39"><a href="#sec-addfractionaldigits">AddFractionalDigits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>).</li><li>If <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> is <emu-val>undefined</emu-val>, then<ol><li>Let <var>maximumFractionDigits</var> be <emu-val>9</emu-val><sub>𝔽</sub>.</li><li>Let <var>minimumFractionDigits</var> be <emu-val>+0</emu-val><sub>𝔽</sub>.</li></ol></li><li>Else,<ol><li>Let <var>maximumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li><li>Let <var>minimumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"maximumFractionDigits"</emu-val>, <var>maximumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumFractionDigits"</emu-val>, <var>minimumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"roundingMode"</emu-val>, <emu-val>"trunc"</emu-val>).</li><li>Set <var>numericUnitFound</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>value</var> is not 0 or <var>display</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Let <var>numberingSystem</var> be <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"numberingSystem"</emu-val>, <var>numberingSystem</var>).</li><li>If <var>signDisplayed</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li><li>If <var>value</var> is 0 and <emu-xref aoid="DurationSign" id="_ref_40"><a href="#sec-durationsign">DurationSign</a></emu-xref>(<var>duration</var>.<var class="field">[[Years]]</var>, <var>duration</var>.<var class="field">[[Months]]</var>, <var>duration</var>.<var class="field">[[Weeks]]</var>, <var>duration</var>.<var class="field">[[Days]]</var>, <var>duration</var>.<var class="field">[[Hours]]</var>, <var>duration</var>.<var class="field">[[Minutes]]</var>, <var>duration</var>.<var class="field">[[Seconds]]</var>, <var>duration</var>.<var class="field">[[Milliseconds]]</var>, <var>duration</var>.<var class="field">[[Microseconds]]</var>, <var>duration</var>.<var class="field">[[Nanoseconds]]</var>) is -1, then<ol><li>Set <var>value</var> to <emu-const>negative-zero</emu-const>.</li></ol></li></ol></li><li>Else,<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"signDisplay"</emu-val>, <emu-val>"never"</emu-val>).</li></ol></li><li>Let <var>numberFormatUnit</var> be the NumberFormat Unit value of the current row.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"style"</emu-val>, <emu-val>"unit"</emu-val>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unit"</emu-val>, <var>numberFormatUnit</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unitDisplay"</emu-val>, <var>style</var>).</li><li>Let <var>nf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%NumberFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>nfOpts</var> »).</li><li>Let <var>parts</var> be !&nbsp;<emu-xref aoid="PartitionNumberPattern"><a href="https://tc39.github.io/ecma402/#sec-partitionnumberpattern">PartitionNumberPattern</a></emu-xref>(<var>nf</var>, <var>value</var>).</li><li>Let <var>list</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>part</var> of <var>parts</var>, do<ol><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <var>part</var>.<var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>: <var>part</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <var>numberFormatUnit</var>&nbsp;} to <var>list</var>.</li></ol></li><li>Append <var>list</var> to <var>result</var>.</li></ol></li></ol></li></ol></li><li>Return <emu-xref aoid="ListFormatParts" id="_ref_41"><a href="#sec-listformatparts">ListFormatParts</a></emu-xref>(<var>durationFormat</var>, <var>result</var>).</li></ol></emu-alg>
 
-    <emu-table id="table-partition-duration-format-pattern"><figure><figcaption>Table 2: DurationFormat instance internal slots and properties relevant to <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_40"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref></figcaption>
+    <emu-table id="table-partition-duration-format-pattern"><figure><figcaption>Table 2: DurationFormat instance internal slots and properties relevant to <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_42"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref></figcaption>
       
         <table class="real-table">
           <thead>
@@ -2962,7 +2962,7 @@ <h1><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var>
 
       <p>When the <code>Intl.DurationFormat</code> function is called with optional arguments <var>locales</var> and <var>options</var>, the following steps are taken:</p>
 
-      <emu-alg><ol><li>If NewTarget is <emu-val>undefined</emu-val>, throw a <emu-val>TypeError</emu-val> exception.</li><li>Let <var>durationFormat</var> be ?&nbsp;<emu-xref aoid="OrdinaryCreateFromConstructor"><a href="https://tc39.es/ecma262/#sec-ordinarycreatefromconstructor">OrdinaryCreateFromConstructor</a></emu-xref>(NewTarget, <emu-val>"%DurationFormatPrototype%"</emu-val>, « <var class="field">[[InitializedDurationFormat]]</var>, <var class="field">[[Locale]]</var>, <var class="field">[[DataLocale]]</var>, <var class="field">[[NumberingSystem]]</var>, <var class="field">[[Style]]</var>, <var class="field">[[YearsStyle]]</var>, <var class="field">[[YearsDisplay]]</var>, <var class="field">[[MonthsStyle]]</var>, <var class="field">[[MonthsDisplay]]</var>, <var class="field">[[WeeksStyle]]</var>, <var class="field">[[WeeksDisplay]]</var>, <var class="field">[[DaysStyle]]</var>, <var class="field">[[DaysDisplay]]</var>, <var class="field">[[HoursStyle]]</var>, <var class="field">[[HoursDisplay]]</var>, <var class="field">[[MinutesStyle]]</var>, <var class="field">[[MinutesDisplay]]</var>, <var class="field">[[SecondsStyle]]</var>, <var class="field">[[SecondsDisplay]]</var>, <var class="field">[[MillisecondsStyle]]</var>, <var class="field">[[MillisecondsDisplay]]</var>, <var class="field">[[MicrosecondsStyle]]</var>, <var class="field">[[MicrosecondsDisplay]]</var>, <var class="field">[[NanosecondsStyle]]</var>, <var class="field">[[NanosecondsDisplay]]</var>, <var class="field">[[HoursMinutesSeparator]]</var>, <var class="field">[[MinutesSecondsSeparator]]</var>, <var class="field">[[FractionalDigits]]</var>, <var class="field">[[TwoDigitHours]]</var> »).</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Let <var>options</var> be ?&nbsp;<emu-xref aoid="GetOptionsObject"><a href="https://tc39.github.io/ecma402/#sec-getoptionsobject">GetOptionsObject</a></emu-xref>(<var>options</var>).</li><li>Let <var>matcher</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"localeMatcher"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"lookup"</emu-val>, <emu-val>"best fit"</emu-val> », <emu-val>"best fit"</emu-val>).</li><li>Let <var>numberingSystem</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"numberingSystem"</emu-val>, <emu-const>string</emu-const>, <emu-val>undefined</emu-val>, <emu-val>undefined</emu-val>).</li><li>If <var>numberingSystem</var> is not <emu-val>undefined</emu-val>, then<ol><li>If <var>numberingSystem</var> does not match the Unicode Locale Identifier <code>type</code> nonterminal, throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>Let <var>opt</var> be the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[localeMatcher]]</var>: <var>matcher</var>, <var class="field">[[nu]]</var>: <var>numberingSystem</var>&nbsp;}.</li><li>Let <var>r</var> be <emu-xref aoid="ResolveLocale"><a href="https://tc39.github.io/ecma402/#sec-resolvelocale">ResolveLocale</a></emu-xref>(<emu-xref href="#sec-intl-durationformat-constructor" id="_ref_41"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>, <var>requestedLocales</var>, <var>opt</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_42"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[RelevantExtensionKeys]]</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_43"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[LocaleData]]</var>).</li><li>Let <var>locale</var> be r.<var class="field">[[locale]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[Locale]]</var> to <var>locale</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[DataLocale]]</var> to <var>r</var>.<var class="field">[[dataLocale]]</var>.</li><li>Let <var>dataLocale</var> be <var>durationFormat</var>.<var class="field">[[DataLocale]]</var>.</li><li>Let <var>dataLocaleData</var> be <var>durationFormat</var>.<var class="field">[[LocaleData]]</var>.[[&lt;<var>dataLocale</var>&gt;]].</li><li>Let <var>digitalFormat</var> be <var>dataLocaleData</var>.<var class="field">[[DigitalFormat]]</var>.</li><li>Let <var>twoDigitHours</var> be <var>digitalFormat</var>.<var class="field">[[TwoDigitHours]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[TwoDigitHours]]</var> to <var>twoDigitHours</var>.</li><li>Let <var>hoursMinutesSeparator</var> be <var>digitalFormat</var>.<var class="field">[[HoursMinutesSeparator]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[HoursMinutesSeparator]]</var> to <var>hoursMinutesSeparator</var>.</li><li>Let <var>minutesSecondsSeparator</var> be <var>digitalFormat</var>.<var class="field">[[MinutesSecondsSeparator]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[MinutesSecondsSeparator]]</var> to <var>minutesSecondsSeparator</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var> to <var>r</var>.<var class="field">[[nu]]</var>.</li><li>Let <var>style</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"style"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"long"</emu-val>, <emu-val>"short"</emu-val>, <emu-val>"narrow"</emu-val>, <emu-val>"digital"</emu-val> », <emu-val>"short"</emu-val>).</li><li>Set <var>durationFormat</var>.<var class="field">[[Style]]</var> to <var>style</var>.</li><li>Let <var>prevStyle</var> be the empty String.</li><li>For each row of <emu-xref href="#table-durationformat" id="_ref_3"><a href="#table-durationformat">Table 3</a></emu-xref>, except the header row, in table order, do<ol><li>Let <var>styleSlot</var> be the Style Slot value of the current row.</li><li>Let <var>displaySlot</var> be the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>Let <var>valueList</var> be the Values value of the current row.</li><li>Let <var>digitalBase</var> be the Digital Default value of the current row.</li><li>Let <var>unitOptions</var> be ?&nbsp;<emu-xref aoid="GetDurationUnitOptions" id="_ref_44"><a href="#sec-getdurationunitoptions">GetDurationUnitOptions</a></emu-xref>(<var>unit</var>, <var>options</var>, <var>style</var>, <var>valueList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var>).</li><li>Set the value of the <var>styleSlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li><li>Set the value of the <var>displaySlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Display]]</var>.</li><li>If <var>unit</var> is one of <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>Set <var>prevStyle</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li></ol></li></ol></li><li>Set <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> to ?&nbsp;<emu-xref aoid="GetNumberOption"><a href="https://tc39.github.io/ecma402/#sec-getnumberoption">GetNumberOption</a></emu-xref>(<var>options</var>, <emu-val>"fractionalDigits"</emu-val>, 0, 9, <emu-val>undefined</emu-val>).</li><li>Return <var>durationFormat</var>.</li></ol></emu-alg>
+      <emu-alg><ol><li>If NewTarget is <emu-val>undefined</emu-val>, throw a <emu-val>TypeError</emu-val> exception.</li><li>Let <var>durationFormat</var> be ?&nbsp;<emu-xref aoid="OrdinaryCreateFromConstructor"><a href="https://tc39.es/ecma262/#sec-ordinarycreatefromconstructor">OrdinaryCreateFromConstructor</a></emu-xref>(NewTarget, <emu-val>"%DurationFormatPrototype%"</emu-val>, « <var class="field">[[InitializedDurationFormat]]</var>, <var class="field">[[Locale]]</var>, <var class="field">[[DataLocale]]</var>, <var class="field">[[NumberingSystem]]</var>, <var class="field">[[Style]]</var>, <var class="field">[[YearsStyle]]</var>, <var class="field">[[YearsDisplay]]</var>, <var class="field">[[MonthsStyle]]</var>, <var class="field">[[MonthsDisplay]]</var>, <var class="field">[[WeeksStyle]]</var>, <var class="field">[[WeeksDisplay]]</var>, <var class="field">[[DaysStyle]]</var>, <var class="field">[[DaysDisplay]]</var>, <var class="field">[[HoursStyle]]</var>, <var class="field">[[HoursDisplay]]</var>, <var class="field">[[MinutesStyle]]</var>, <var class="field">[[MinutesDisplay]]</var>, <var class="field">[[SecondsStyle]]</var>, <var class="field">[[SecondsDisplay]]</var>, <var class="field">[[MillisecondsStyle]]</var>, <var class="field">[[MillisecondsDisplay]]</var>, <var class="field">[[MicrosecondsStyle]]</var>, <var class="field">[[MicrosecondsDisplay]]</var>, <var class="field">[[NanosecondsStyle]]</var>, <var class="field">[[NanosecondsDisplay]]</var>, <var class="field">[[HoursMinutesSeparator]]</var>, <var class="field">[[MinutesSecondsSeparator]]</var>, <var class="field">[[FractionalDigits]]</var>, <var class="field">[[TwoDigitHours]]</var> »).</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Let <var>options</var> be ?&nbsp;<emu-xref aoid="GetOptionsObject"><a href="https://tc39.github.io/ecma402/#sec-getoptionsobject">GetOptionsObject</a></emu-xref>(<var>options</var>).</li><li>Let <var>matcher</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"localeMatcher"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"lookup"</emu-val>, <emu-val>"best fit"</emu-val> », <emu-val>"best fit"</emu-val>).</li><li>Let <var>numberingSystem</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"numberingSystem"</emu-val>, <emu-const>string</emu-const>, <emu-val>undefined</emu-val>, <emu-val>undefined</emu-val>).</li><li>If <var>numberingSystem</var> is not <emu-val>undefined</emu-val>, then<ol><li>If <var>numberingSystem</var> does not match the Unicode Locale Identifier <code>type</code> nonterminal, throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>Let <var>opt</var> be the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[localeMatcher]]</var>: <var>matcher</var>, <var class="field">[[nu]]</var>: <var>numberingSystem</var>&nbsp;}.</li><li>Let <var>r</var> be <emu-xref aoid="ResolveLocale"><a href="https://tc39.github.io/ecma402/#sec-resolvelocale">ResolveLocale</a></emu-xref>(<emu-xref href="#sec-intl-durationformat-constructor" id="_ref_43"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>, <var>requestedLocales</var>, <var>opt</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_44"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[RelevantExtensionKeys]]</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_45"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[LocaleData]]</var>).</li><li>Let <var>locale</var> be r.<var class="field">[[locale]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[Locale]]</var> to <var>locale</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[DataLocale]]</var> to <var>r</var>.<var class="field">[[dataLocale]]</var>.</li><li>Let <var>dataLocale</var> be <var>durationFormat</var>.<var class="field">[[DataLocale]]</var>.</li><li>Let <var>dataLocaleData</var> be <var>durationFormat</var>.<var class="field">[[LocaleData]]</var>.[[&lt;<var>dataLocale</var>&gt;]].</li><li>Let <var>digitalFormat</var> be <var>dataLocaleData</var>.<var class="field">[[DigitalFormat]]</var>.</li><li>Let <var>twoDigitHours</var> be <var>digitalFormat</var>.<var class="field">[[TwoDigitHours]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[TwoDigitHours]]</var> to <var>twoDigitHours</var>.</li><li>Let <var>hoursMinutesSeparator</var> be <var>digitalFormat</var>.<var class="field">[[HoursMinutesSeparator]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[HoursMinutesSeparator]]</var> to <var>hoursMinutesSeparator</var>.</li><li>Let <var>minutesSecondsSeparator</var> be <var>digitalFormat</var>.<var class="field">[[MinutesSecondsSeparator]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[MinutesSecondsSeparator]]</var> to <var>minutesSecondsSeparator</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var> to <var>r</var>.<var class="field">[[nu]]</var>.</li><li>Let <var>style</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"style"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"long"</emu-val>, <emu-val>"short"</emu-val>, <emu-val>"narrow"</emu-val>, <emu-val>"digital"</emu-val> », <emu-val>"short"</emu-val>).</li><li>Set <var>durationFormat</var>.<var class="field">[[Style]]</var> to <var>style</var>.</li><li>Let <var>prevStyle</var> be the empty String.</li><li>For each row of <emu-xref href="#table-durationformat" id="_ref_3"><a href="#table-durationformat">Table 3</a></emu-xref>, except the header row, in table order, do<ol><li>Let <var>styleSlot</var> be the Style Slot value of the current row.</li><li>Let <var>displaySlot</var> be the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>Let <var>valueList</var> be the Values value of the current row.</li><li>Let <var>digitalBase</var> be the Digital Default value of the current row.</li><li>Let <var>unitOptions</var> be ?&nbsp;<emu-xref aoid="GetDurationUnitOptions" id="_ref_46"><a href="#sec-getdurationunitoptions">GetDurationUnitOptions</a></emu-xref>(<var>unit</var>, <var>options</var>, <var>style</var>, <var>valueList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var>).</li><li>Set the value of the <var>styleSlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li><li>Set the value of the <var>displaySlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Display]]</var>.</li><li>If <var>unit</var> is one of <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>Set <var>prevStyle</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li></ol></li></ol></li><li>Set <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> to ?&nbsp;<emu-xref aoid="GetNumberOption"><a href="https://tc39.github.io/ecma402/#sec-getnumberoption">GetNumberOption</a></emu-xref>(<var>options</var>, <emu-val>"fractionalDigits"</emu-val>, 0, 9, <emu-val>undefined</emu-val>).</li><li>Return <var>durationFormat</var>.</li></ol></emu-alg>
       <emu-table id="table-durationformat"><figure><figcaption>Table 3: Internal slots and property names of DurationFormat instances relevant to Intl.DurationFormat <emu-xref href="#constructor"><a href="https://tc39.es/ecma262/#constructor">constructor</a></emu-xref></figcaption>
       
         <table class="real-table">
@@ -3058,7 +3058,7 @@ <h1><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constr
         <emu-clause id="sec-Intl.DurationFormat.prototype">
           <h1><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</h1>
 
-          <p>The value of <code>Intl.DurationFormat.prototype</code> is <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_45"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
+          <p>The value of <code>Intl.DurationFormat.prototype</code> is <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_47"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
 
           <p>This property has the attributes { <var class="field">[[Writable]]</var>: <emu-val>false</emu-val>, <var class="field">[[Enumerable]]</var>: <emu-val>false</emu-val>, <var class="field">[[Configurable]]</var>: <emu-val>false</emu-val> }.</p>
         </emu-clause>
@@ -3068,7 +3068,7 @@ <h1><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <
 
           <p>When the <code>supportedLocalesOf</code> method is called with arguments <var>locales</var> and <var>options</var>, the following steps are taken:</p>
 
-          <emu-alg><ol><li>Let <var>availableLocales</var> be <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_46"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>.</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Return ?&nbsp;<emu-xref aoid="SupportedLocales"><a href="https://tc39.github.io/ecma402/#sec-supportedlocales">SupportedLocales</a></emu-xref>(<var>availableLocales</var>, <var>requestedLocales</var>, <var>options</var>).</li></ol></emu-alg>
+          <emu-alg><ol><li>Let <var>availableLocales</var> be <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_48"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>.</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Return ?&nbsp;<emu-xref aoid="SupportedLocales"><a href="https://tc39.github.io/ecma402/#sec-supportedlocales">SupportedLocales</a></emu-xref>(<var>availableLocales</var>, <var>requestedLocales</var>, <var>options</var>).</li></ol></emu-alg>
         </emu-clause>
 
         <emu-clause id="sec-Intl.DurationFormat-internal-slots">
@@ -3102,7 +3102,7 @@ <h1><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Protot
         <emu-clause id="sec-Intl.DurationFormat.prototype.constructor">
           <h1><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</h1>
 
-          <p>The initial value of <code>Intl.DurationFormat.prototype.constructor</code> is the intrinsic object <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_47"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.</p>
+          <p>The initial value of <code>Intl.DurationFormat.prototype.constructor</code> is the intrinsic object <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_49"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.</p>
         </emu-clause>
 
         <emu-clause id="sec-Intl.DurationFormat.prototype-@@tostringtag">
@@ -3117,14 +3117,14 @@ <h1><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <va
 
           <p>When the <code>format</code> method is called with an argument <var>duration</var>, the following steps are taken:</p>
 
-          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_48"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_49"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be the empty String.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Set <var>result</var> to the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>result</var> and <var>part</var>.<var class="field">[[Value]]</var>.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
+          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_50"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_51"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be the empty String.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Set <var>result</var> to the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>result</var> and <var>part</var>.<var class="field">[[Value]]</var>.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
         </emu-clause>
         <emu-clause id="sec-Intl.DurationFormat.prototype.formatToParts">
           <h1><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</h1>
 
           <p>When the <code>formatToParts</code> method is called with an argument <var>duration</var>, the following steps are taken:</p>
 
-          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_50"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_51"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be !&nbsp;<emu-xref aoid="ArrayCreate"><a href="https://tc39.es/ecma262/#sec-arraycreate">ArrayCreate</a></emu-xref>(0).</li><li>Let <var>n</var> be 0.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Let <var>obj</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(%ObjectPrototype%).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"type"</emu-val>, <var>part</var>.<var class="field">[[Type]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"value"</emu-val>, <var>part</var>.<var class="field">[[Value]]</var>).</li><li>If <var>part</var>.<var class="field">[[Unit]]</var> is not <emu-const>empty</emu-const>, perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"unit"</emu-val>, <var>part</var>.<var class="field">[[Unit]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>result</var>, !&nbsp;<emu-xref aoid="ToString"><a href="https://tc39.es/ecma262/#sec-tostring">ToString</a></emu-xref>(<var>n</var>), <var>obj</var>).</li><li>Set <var>n</var> to <var>n</var> + 1.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
+          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_52"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_53"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be !&nbsp;<emu-xref aoid="ArrayCreate"><a href="https://tc39.es/ecma262/#sec-arraycreate">ArrayCreate</a></emu-xref>(0).</li><li>Let <var>n</var> be 0.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Let <var>obj</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(%ObjectPrototype%).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"type"</emu-val>, <var>part</var>.<var class="field">[[Type]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"value"</emu-val>, <var>part</var>.<var class="field">[[Value]]</var>).</li><li>If <var>part</var>.<var class="field">[[Unit]]</var> is not <emu-const>empty</emu-const>, perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"unit"</emu-val>, <var>part</var>.<var class="field">[[Unit]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>result</var>, !&nbsp;<emu-xref aoid="ToString"><a href="https://tc39.es/ecma262/#sec-tostring">ToString</a></emu-xref>(<var>n</var>), <var>obj</var>).</li><li>Set <var>n</var> to <var>n</var> + 1.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
         </emu-clause>
         <emu-clause id="sec-Intl.DurationFormat.prototype.resolvedOptions">
           <h1><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</h1>
@@ -3246,7 +3246,7 @@ <h1><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOpti
       <emu-clause id="sec-properties-of-intl-durationformat-instances">
         <h1><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</h1>
 
-        <p>Intl.DurationFormat instances inherit properties from <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_52"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
+        <p>Intl.DurationFormat instances inherit properties from <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_54"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
         <p>Intl.DurationFormat instances have an <var class="field">[[InitializedDurationFormat]]</var> internal slot.</p>
         <p>Intl.DurationFormat instances also have several internal slots that are computed by the <emu-xref href="#constructor"><a href="https://tc39.es/ecma262/#constructor">constructor</a></emu-xref>:</p>
 
diff --git a/spec.emu b/spec.emu
index 0094b04..3eed823 100644
--- a/spec.emu
+++ b/spec.emu
@@ -469,9 +469,15 @@ contributors: Ujjwal Sharma, Younies Mahmoud
           1. Else if _minutesValue_ is not 0 or _minutesDisplay_ is not *"auto"*, then
             1. Set _minutesFormatted_ to *true*.
         1. If _hoursFormatted_ is *true*, then
+          1. If _signDisplayed_ is *true*, then
+            1. If _hoursValue_ is 0 and DurationSign(_duration_.[[Years]], _duration_.[[Months]], _duration_.[[Weeks]], _duration_.[[Days]], _duration_.[[Hours]], _duration_.[[Minutes]], _duration_.[[Seconds]], _duration_.[[Milliseconds]], _duration_.[[Microseconds]], _duration_.[[Nanoseconds]]) is -1, then
+              1. Set _hoursValue_ to ~negative-zero~.
           1. Append FormatNumericHours(_durationFormat_, _hoursValue_, _signDisplayed_) to _numericPartsList_.
           1. Set _signDisplayed_ to *false*.
         1. If _minutesFormatted_ is *true*, then
+          1. If _signDisplayed_ is *true*, then
+            1. If _minutesValue_ is 0 and DurationSign(_duration_.[[Years]], _duration_.[[Months]], _duration_.[[Weeks]], _duration_.[[Days]], _duration_.[[Hours]], _duration_.[[Minutes]], _duration_.[[Seconds]], _duration_.[[Milliseconds]], _duration_.[[Microseconds]], _duration_.[[Nanoseconds]]) is -1, then
+              1. Set _minutesValue_ to ~negative-zero~.
           1. Append FormatNumericMinutes(_durationFormat_, _minutesValue_, _hoursFormatted_, _signDisplayed_) to _numericPartsList_.
           1. Set _signDisplayed_ to *false*.
         1. If _secondsFormatted_ is *true*, then