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	<title>Promise.prototype.finally</title>
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		// The following license applies to the fuzzysearch function
		// The MIT License (MIT)
		// Copyright © 2015 Nicolas Bevacqua
		// Copyright © 2016 Brian Terlson
		// Permission is hereby granted, free of charge, to any person obtaining a copy of
		// this software and associated documentation files (the "Software"), to deal in
		// the Software without restriction, including without limitation the rights to
		// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
		// the Software, and to permit persons to whom the Software is furnished to do so,
		// subject to the following conditions:

		// The above copyright notice and this permission notice shall be included in all
		// copies or substantial portions of the Software.

		// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
		// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
		// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
		// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		function fuzzysearch(searchString, haystack, caseInsensitive) {
			var tlen = haystack.length;
			var qlen = searchString.length;
			var chunks = 1;
			var finding = false;
			var prefix = true;

			if (qlen > tlen) {
				return false;
			}

			if (qlen === tlen) {
				if (searchString === haystack) {
					return {
						caseMatch: true,
						chunks: 1,
						prefix: true
					};
				} else if (searchString.toLowerCase() === haystack.toLowerCase()) {
					return {
						caseMatch: false,
						chunks: 1,
						prefix: true
					};
				} else {
					return false;
				}
			}

			outer: for (var i = 0, j = 0; i < qlen; i++) {
				var nch = searchString[i];
				while (j < tlen) {
					var targetChar = haystack[j++];
					if (targetChar === nch) {
						finding = true;
						continue outer;
					}
					if (finding) {
						chunks++;
						finding = false;
					}
				}

				if (caseInsensitive) {
					return false
				}

				return fuzzysearch(searchString.toLowerCase(), haystack.toLowerCase(), true);
			}

			return {
				caseMatch: !caseInsensitive,
				chunks: chunks,
				prefix: j <= qlen
			};
		}

		var Toolbox = {
			init: function() {
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				this.$container.classList.add('toolbox');
				this.$permalink = document.createElement('a');
				this.$permalink.textContent = 'Permalink';
				this.$pinLink = document.createElement('a');
				this.$pinLink.textContent = 'Pin';
				this.$pinLink.setAttribute('href', '#');
				this.$pinLink.addEventListener('click', function(e) {
					e.preventDefault();
					e.stopPropagation();
					menu.togglePinEntry(this.entry.id);
				}.bind(this));

				this.$refsLink = document.createElement('a');
				this.$refsLink.setAttribute('href', '#');
				this.$refsLink.addEventListener('click', function(e) {
					e.preventDefault();
					e.stopPropagation();
					referencePane.showReferencesFor(this.entry);
				}.bind(this));
				this.$container.appendChild(this.$permalink);
				this.$container.appendChild(this.$pinLink);
				this.$container.appendChild(this.$refsLink);
				document.body.appendChild(this.$container);
			},

			activate: function(el, entry, target) {
				if (el === this._activeEl) return;
				this.active = true;
				this.entry = entry;
				this.$container.classList.add('active');
				this.top = el.offsetTop - this.$container.offsetHeight - 10;
				this.left = el.offsetLeft;
				this.$container.setAttribute('style', 'left: ' + this.left + 'px; top: ' + this.top + 'px');
				this.updatePermalink();
				this.updateReferences();
				this._activeEl = el;
				if (this.top < document.body.scrollTop && el === target) {
					// don't scroll unless it's a small thing (< 200px)
					this.$container.scrollIntoView();
				}
			},

			updatePermalink: function() {
				this.$permalink.setAttribute('href', '#' + this.entry.id);
			},

			updateReferences: function() {
				this.$refsLink.textContent = 'References (' + this.entry.referencingIds.length + ')';
			},

			activateIfMouseOver: function(e) {
				var ref = this.findReferenceUnder(e.target);
				if (ref && (!this.active || e.pageY > this._activeEl.offsetTop)) {
					var entry = menu.search.biblio.byId[ref.id];
					this.activate(ref.element, entry, e.target);
				} else if (this.active && ((e.pageY < this.top) || e.pageY > (this._activeEl.offsetTop + this._activeEl.offsetHeight))) {
					this.deactivate();
				}
			},

			findReferenceUnder: function(el) {
				while (el) {
					var parent = el.parentNode;
					if (el.nodeName === 'H1' && parent.nodeName.match(/EMU-CLAUSE|EMU-ANNEX|EMU-INTRO/) && parent.id) {
						return {
							element: el,
							id: parent.id
						};
					} else if (el.nodeName.match(/EMU-(?!CLAUSE|XREF|ANNEX|INTRO)|DFN/) &&
						el.id && el.id[0] !== '_') {
						if (el.nodeName === 'EMU-FIGURE' || el.nodeName === 'EMU-TABLE' || el.nodeName === 'EMU-EXAMPLE') {
							// return the figcaption element
							return {
								element: el.children[0].children[0],
								id: el.id
							};
						} else if (el.nodeName === 'EMU-PRODUCTION') {
							// return the LHS non-terminal element
							return {
								element: el.children[0],
								id: el.id
							};
						} else {
							return {
								element: el,
								id: el.id
							};
						}
					}
					el = parent;
				}
			},

			deactivate: function() {
				this.$container.classList.remove('active');
				this._activeEl = null;
				this.activeElBounds = null;
				this.active = false;
			}
		}

		var referencePane = {
			init: function() {
				this.$container = document.createElement('div');
				this.$container.setAttribute('id', 'references-pane-container');

				var $spacer = document.createElement('div');
				$spacer.setAttribute('id', 'references-pane-spacer');

				this.$pane = document.createElement('div');
				this.$pane.setAttribute('id', 'references-pane');

				this.$container.appendChild($spacer);
				this.$container.appendChild(this.$pane);

				this.$header = document.createElement('div');
				this.$header.classList.add('menu-pane-header');
				this.$header.textContent = 'References to ';
				this.$headerRefId = document.createElement('a');
				this.$header.appendChild(this.$headerRefId);
				this.$closeButton = document.createElement('span');
				this.$closeButton.setAttribute('id', 'references-pane-close');
				this.$closeButton.addEventListener('click', function(e) {
					this.deactivate();
				}.bind(this));
				this.$header.appendChild(this.$closeButton);

				this.$pane.appendChild(this.$header);
				var tableContainer = document.createElement('div');
				tableContainer.setAttribute('id', 'references-pane-table-container');

				this.$table = document.createElement('table');
				this.$table.setAttribute('id', 'references-pane-table');

				this.$tableBody = this.$table.createTBody();

				tableContainer.appendChild(this.$table);
				this.$pane.appendChild(tableContainer);

				menu.$specContainer.appendChild(this.$container);
			},

			activate: function() {
				this.$container.classList.add('active');
			},

			deactivate: function() {
				this.$container.classList.remove('active');
			},

			showReferencesFor(entry) {
				this.activate();
				var newBody = document.createElement('tbody');
				var previousId;
				var previousCell;
				var dupCount = 0;
				this.$headerRefId.textContent = '#' + entry.id;
				this.$headerRefId.setAttribute('href', '#' + entry.id);
				entry.referencingIds.map(function(id) {
					var target = document.getElementById(id);
					var cid = findParentClauseId(target);
					var clause = menu.search.biblio.byId[cid];
					var dupCount = 0;
					return {
						id: id,
						clause: clause
					}
				}).sort(function(a, b) {
					return sortByClauseNumber(a.clause, b.clause);
				}).forEach(function(record, i) {
					if (previousId === record.clause.id) {
						previousCell.innerHTML += ' (<a href="#' + record.id + '">' + (dupCount + 2) + '</a>)';
						dupCount++;
					} else {
						var row = newBody.insertRow();
						var cell = row.insertCell();
						cell.innerHTML = record.clause.number;
						cell = row.insertCell();
						cell.innerHTML = '<a href="#' + record.id + '">' + record.clause.titleHTML + '</a>';
						previousCell = cell;
						previousId = record.clause.id;
						dupCount = 0;
					}
				}, this);
				this.$table.removeChild(this.$tableBody);
				this.$tableBody = newBody;
				this.$table.appendChild(this.$tableBody);
			}
		}

		function findParentClauseId(node) {
			while (node && node.nodeName !== 'EMU-CLAUSE' && node.nodeName !== 'EMU-INTRO' && node.nodeName !== 'EMU-ANNEX') {
				node = node.parentNode;
			}
			if (!node) return null;
			return node.getAttribute('id');
		}

		function sortByClauseNumber(c1, c2) {
			var c1c = c1.number.split('.');
			var c2c = c2.number.split('.');

			for (var i = 0; i < c1c.length; i++) {
				if (i >= c2c.length) {
					return 1;
				}

				var c1 = c1c[i];
				var c2 = c2c[i];
				var c1cn = Number(c1);
				var c2cn = Number(c2);

				if (Number.isNaN(c1cn) && Number.isNaN(c2cn)) {
					if (c1 > c2) {
						return 1;
					} else if (c1 < c2) {
						return -1;
					}
				} else if (!Number.isNaN(c1cn) && Number.isNaN(c2cn)) {
					return -1;
				} else if (Number.isNaN(c1cn) && !Number.isNaN(c2cn)) {
					return 1;
				} else if (c1cn > c2cn) {
					return 1;
				} else if (c1cn < c2cn) {
					return -1;
				}
			}

			if (c1c.length === c2c.length) {
				return 0;
			}
			return -1;
		}

		document.addEventListener('DOMContentLoaded', function() {
			Toolbox.init();
			referencePane.init();
		})
		var CLAUSE_NODES = ['EMU-CLAUSE', 'EMU-INTRO', 'EMU-ANNEX'];

		function findLocalReferences($elem) {
			var name = $elem.innerHTML;
			var references = [];

			var parentClause = $elem.parentNode;
			while (parentClause && CLAUSE_NODES.indexOf(parentClause.nodeName) === -1) {
				parentClause = parentClause.parentNode;
			}

			if (!parentClause) return;

			var vars = parentClause.querySelectorAll('var');

			for (var i = 0; i < vars.length; i++) {
				var $var = vars[i];

				if ($var.innerHTML === name) {
					references.push($var);
				}
			}

			return references;
		}

		function toggleFindLocalReferences($elem) {
			var references = findLocalReferences($elem);
			if ($elem.classList.contains('referenced')) {
				references.forEach(function($reference) {
					$reference.classList.remove('referenced');
				});
			} else {
				references.forEach(function($reference) {
					$reference.classList.add('referenced');
				});
			}
		}

		function installFindLocalReferences() {
			document.addEventListener('click', function(e) {
				if (e.target.nodeName === 'VAR') {
					toggleFindLocalReferences(e.target);
				}
			});
		}

		document.addEventListener('DOMContentLoaded', installFindLocalReferences);

	</script>
	<style>
		body {
			display: flex;
			font-size: 18px;
			line-height: 1.5;
			font-family: Cambria, Palatino Linotype, Palatino, Liberation Serif, serif;
			padding: 0;
			margin: 0;
			color: #111;
		}

		#spec-container {
			padding: 0 20px;
			flex-grow: 1;
			flex-basis: 66%;
			box-sizing: border-box;
			overflow: hidden;
		}

		body.oldtoc {
			margin: 0 auto;
		}

		a {
			text-decoration: none;
			color: #206ca7;
		}

		a:visited {
			color: #206ca7;
		}

		a:hover {
			text-decoration: underline;
			color: #239dee;
		}


		code {
			font-weight: bold;
			font-family: Consolas, Monaco, monospace;
			white-space: pre;
		}

		pre code {
			font-weight: inherit;
		}

		pre code.hljs {
			background-color: #fff;
			margin: 0;
			padding: 0;
		}

		ol.toc {
			list-style: none;
			padding-left: 0;
		}

		ol.toc ol.toc {
			padding-left: 2ex;
			list-style: none;
		}

		var {
			color: #2aa198;
			transition: background-color 0.25s ease;
			cursor: pointer;
		}

		var.referenced {
			background-color: #ffff33;
		}

		emu-const {
			font-family: sans-serif;
		}

		emu-val {
			font-weight: bold;
		}

		emu-alg ol,
		emu-alg ol ol ol ol {
			list-style-type: decimal;
		}

		emu-alg ol ol,
		emu-alg ol ol ol ol ol {
			list-style-type: lower-alpha;
		}

		emu-alg ol ol ol,
		ol ol ol ol ol ol {
			list-style-type: lower-roman;
		}

		emu-eqn {
			display: block;
			margin-left: 4em;
		}

		emu-eqn.inline {
			display: inline;
			margin: 0;
		}

		emu-eqn div:first-child {
			margin-left: -2em;
		}

		emu-note {
			margin: 1em 0;
			color: #666;
			border-left: 5px solid #ccc;
			display: flex;
			flex-direction: row;
		}

		emu-note>span.note {
			flex-basis: 100px;
			min-width: 100px;
			flex-grow: 0;
			flex-shrink: 1;
			text-transform: uppercase;
			padding-left: 5px;
		}

		emu-note[type=editor] {
			border-left-color: #faa;
		}

		emu-note>div.note-contents {
			flex-grow: 1;
			flex-shrink: 1;
		}

		emu-note>div.note-contents>p:first-of-type {
			margin-top: 0;
		}

		emu-note>div.note-contents>p:last-of-type {
			margin-bottom: 0;
		}

		emu-figure {
			display: block;
		}

		emu-example {
			display: block;
			margin: 1em 3em;
		}

		emu-example figure figcaption {
			margin-top: 0.5em;
			text-align: left;
		}

		emu-figure figure,
		emu-example figure,
		emu-table figure {
			display: flex;
			flex-direction: column;
			align-items: center;
		}

		emu-production {
			display: block;
			margin-top: 1em;
			margin-bottom: 1em;
			margin-left: 5ex;
		}

		emu-grammar.inline,
		emu-production.inline,
		emu-grammar.inline emu-production emu-rhs,
		emu-production.inline emu-rhs,
		emu-grammar[collapsed] emu-production emu-rhs,
		emu-production[collapsed] emu-rhs {
			display: inline;
			padding-left: 1ex;
			margin-left: 0;
		}

		emu-grammar[collapsed] emu-production,
		emu-production[collapsed] {
			margin: 0;
		}

		emu-constraints {
			font-size: .75em;
			margin-right: 1ex;
		}

		emu-gann {
			margin-right: 1ex;
		}

		emu-gann emu-t:last-child,
		emu-gann emu-nt:last-child {
			margin-right: 0;
		}

		emu-geq {
			margin-left: 1ex;
			font-weight: bold;
		}

		emu-oneof {
			font-weight: bold;
			margin-left: 1ex;
		}

		emu-nt {
			display: inline-block;
			font-style: italic;
			white-space: nowrap;
			text-indent: 0;
		}

		emu-nt a,
		emu-nt a:visited {
			color: #333;
		}

		emu-rhs emu-nt {
			margin-right: 1ex;
		}

		emu-t {
			display: inline-block;
			font-family: monospace;
			font-weight: bold;
			white-space: nowrap;
			text-indent: 0;
		}

		emu-production emu-t {
			margin-right: 1ex;
		}

		emu-rhs {
			display: block;
			padding-left: 75px;
			text-indent: -25px;
		}

		emu-mods {
			font-size: .85em;
			vertical-align: sub;
			font-style: normal;
			font-weight: normal;
		}

		emu-production[collapsed] emu-mods {
			display: none;
		}

		emu-params,
		emu-opt {
			margin-right: 1ex;
			font-family: monospace;
		}

		emu-params,
		emu-constraints {
			color: #2aa198;
		}

		emu-opt {
			color: #b58900;
		}

		emu-gprose {
			font-size: 0.9em;
			font-family: Helvetica, Arial, sans-serif;
		}

		h1.shortname {
			color: #f60;
			font-size: 1.5em;
			margin: 0;
		}

		h1.version {
			color: #f60;
			font-size: 1.5em;
			margin: 0;
		}

		h1.title {
			margin-top: 0;
			color: #f60;
		}

		h1.first {
			margin-top: 0;
		}

		h1,
		h2,
		h3,
		h4,
		h5,
		h6 {
			position: relative;
		}

		h1 .secnum {
			text-decoration: none;
			margin-right: 10px;
		}

		h1 span.title {
			order: 2;
		}


		h1 {
			font-size: 2.67em;
			margin-top: 2em;
			margin-bottom: 0;
			line-height: 1em;
		}

		h2 {
			font-size: 2em;
		}

		h3 {
			font-size: 1.56em;
		}

		h4 {
			font-size: 1.25em;
		}

		h5 {
			font-size: 1.11em;
		}

		h6 {
			font-size: 1em;
		}

		h1:hover span.utils {
			display: block;
		}

		span.utils {
			font-size: 18px;
			line-height: 18px;
			display: none;
			position: absolute;
			top: 100%;
			left: 0;
			right: 0;
			font-weight: normal;
		}

		span.utils:before {
			content: "⤷";
			display: inline-block;
			padding: 0 5px;
		}

		span.utils>* {
			display: inline-block;
			margin-right: 20px;
		}

		h1 span.utils span.anchor a,
		h2 span.utils span.anchor a,
		h3 span.utils span.anchor a,
		h4 span.utils span.anchor a,
		h5 span.utils span.anchor a,
		h6 span.utils span.anchor a {
			text-decoration: none;
			font-variant: small-caps;
		}

		h1 span.utils span.anchor a:hover,
		h2 span.utils span.anchor a:hover,
		h3 span.utils span.anchor a:hover,
		h4 span.utils span.anchor a:hover,
		h5 span.utils span.anchor a:hover,
		h6 span.utils span.anchor a:hover {
			color: #333;
		}

		emu-intro h1,
		emu-clause h1,
		emu-annex h1 {
			font-size: 2em;
		}

		emu-intro h2,
		emu-clause h2,
		emu-annex h2 {
			font-size: 1.56em;
		}

		emu-intro h3,
		emu-clause h3,
		emu-annex h3 {
			font-size: 1.25em;
		}

		emu-intro h4,
		emu-clause h4,
		emu-annex h4 {
			font-size: 1.11em;
		}

		emu-intro h5,
		emu-clause h5,
		emu-annex h5 {
			font-size: 1em;
		}

		emu-intro h6,
		emu-clause h6,
		emu-annex h6 {
			font-size: 0.9em;
		}

		emu-intro emu-intro h1,
		emu-clause emu-clause h1,
		emu-annex emu-annex h1 {
			font-size: 1.56em;
		}

		emu-intro emu-intro h2,
		emu-clause emu-clause h2,
		emu-annex emu-annex h2 {
			font-size: 1.25em;
		}

		emu-intro emu-intro h3,
		emu-clause emu-clause h3,
		emu-annex emu-annex h3 {
			font-size: 1.11em;
		}

		emu-intro emu-intro h4,
		emu-clause emu-clause h4,
		emu-annex emu-annex h4 {
			font-size: 1em;
		}

		emu-intro emu-intro h5,
		emu-clause emu-clause h5,
		emu-annex emu-annex h5 {
			font-size: 0.9em;
		}

		emu-intro emu-intro emu-intro h1,
		emu-clause emu-clause emu-clause h1,
		emu-annex emu-annex emu-annex h1 {
			font-size: 1.25em;
		}

		emu-intro emu-intro emu-intro h2,
		emu-clause emu-clause emu-clause h2,
		emu-annex emu-annex emu-annex h2 {
			font-size: 1.11em;
		}

		emu-intro emu-intro emu-intro h3,
		emu-clause emu-clause emu-clause h3,
		emu-annex emu-annex emu-annex h3 {
			font-size: 1em;
		}

		emu-intro emu-intro emu-intro h4,
		emu-clause emu-clause emu-clause h4,
		emu-annex emu-annex emu-annex h4 {
			font-size: 0.9em;
		}

		emu-intro emu-intro emu-intro emu-intro h1,
		emu-clause emu-clause emu-clause emu-clause h1,
		emu-annex emu-annex emu-annex emu-annex h1 {
			font-size: 1.11em;
		}

		emu-intro emu-intro emu-intro emu-intro h2,
		emu-clause emu-clause emu-clause emu-clause h2,
		emu-annex emu-annex emu-annex emu-annex h2 {
			font-size: 1em;
		}

		emu-intro emu-intro emu-intro emu-intro h3,
		emu-clause emu-clause emu-clause emu-clause h3,
		emu-annex emu-annex emu-annex emu-annex h3 {
			font-size: 0.9em;
		}

		emu-intro emu-intro emu-intro emu-intro emu-intro h1,
		emu-clause emu-clause emu-clause emu-clause emu-clause h1,
		emu-annex emu-annex emu-annex emu-annex emu-annex h1 {
			font-size: 1em;
		}

		emu-intro emu-intro emu-intro emu-intro emu-intro h2,
		emu-clause emu-clause emu-clause emu-clause emu-clause h2,
		emu-annex emu-annex emu-annex emu-annex emu-annex h2 {
			font-size: 0.9em;
		}

		emu-intro emu-intro emu-intro emu-intro emu-intro emu-intro h1,
		emu-clause emu-clause emu-clause emu-clause emu-clause emu-clause h1,
		emu-annex emu-annex emu-annex emu-annex emu-annex emu-annex h1 {
			font-size: 0.9em
		}

		emu-clause,
		emu-intro,
		emu-annex {
			display: block;
		}

		/* Figures and tables */

		figure {
			display: block;
			margin: 1em 0 3em 0;
		}

		figure object {
			display: block;
			margin: 0 auto;
		}

		figure table.real-table {
			margin: 0 auto;
		}

		figure figcaption {
			display: block;
			color: #555555;
			font-weight: bold;
			text-align: center;
		}

		emu-table table {
			margin: 0 auto;
		}

		emu-table table,
		table.real-table {
			border-collapse: collapse;
		}

		emu-table td,
		emu-table th,
		table.real-table td,
		table.real-table th {
			border: 1px solid black;
			padding: 0.4em;
			vertical-align: baseline;
		}

		emu-table th,
		emu-table thead td,
		table.real-table th {
			background-color: #eeeeee;
		}

		/* Note: the left content edges of table.lightweight-table >tbody >tr >td
   and div.display line up. */

		table.lightweight-table {
			border-collapse: collapse;
			margin: 0 0 0 1.5em;
		}

		table.lightweight-table td,
		table.lightweight-table th {
			border: none;
			padding: 0 0.5em;
			vertical-align: baseline;
		}

		/* diff styles */

		ins {
			background-color: #e0f8e0;
			text-decoration: none;
			border-bottom: 1px solid #396;
		}

		del {
			background-color: #fee;
		}

		ins.block,
		del.block,
		emu-production>ins,
		emu-production>del,
		emu-grammar>ins,
		emu-grammar>del {
			display: block;
		}

		tr.ins>td>ins {
			border-bottom: none;
		}

		tr.ins>td {
			background-color: #e0f8e0;
		}

		tr.del>td {
			background-color: #fee;
		}

		/* Menu Styles */

		#menu-toggle {
			font-size: 2em;

			position: fixed;
			top: 0;
			left: 0;
			width: 1.5em;
			height: 1.5em;
			z-index: 3;
			visibility: hidden;
			color: #1567a2;
			background-color: #fff;

			line-height: 1.5em;
			text-align: center;
			-webkit-touch-callout: none;
			-webkit-user-select: none;
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	</style>
</head>

<body>
	<div id="menu-toggle">☰</div>
	<div id="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="#sec-promise.prototype.finally" title="Promise.prototype.finally ( onFinally )"><span class="secnum">1</span> Promise.prototype.finally ( <var>onFinally</var> )</a>
					<ol class="toc">
						<li><span class="item-toggle-none"></span><a href="#sec-thenfinallyfunction" title="ThenFinally Function"><span class="secnum">1.1</span> ThenFinally Function</a></li>
						<li><span class="item-toggle-none"></span><a href="#sec-catchfinallyfunction" title="CatchFinally Function"><span class="secnum">1.2</span> CatchFinally Function</a></li>
					</ol>
				</li>
				<li><span class="item-toggle-none"></span><a href="#sec-promise.resolve" title="Promise.resolve ( x )"><span class="secnum">2</span> Promise.resolve ( <var>x</var> )</a></li>
				<li><span class="item-toggle-none"></span><a href="#sec-promise-resolve" title="PromiseResolve ( C, x )"><span class="secnum">3</span> PromiseResolve ( <var>C</var>, <var>x</var> )</a></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 first">Stage 4 Draft / January 24, 2018</h1>
		<h1 class="title">Promise.prototype.finally</h1>

		<emu-clause id="sec-promise.prototype.finally">
			<h1><span class="secnum">1</span>Promise.prototype.finally ( <var>onFinally</var> )</h1>
			<p>When the <code>finally</code> method is called with argument <var>onFinally</var>, the following steps are taken:</p>
			<emu-alg>
				<ol>
					<li>Let <var>promise</var> be the
						<emu-val>this</emu-val> value.</li>
					<li>If
						<emu-xref aoid="Type" id="_ref_2"><a href="https://tc39.github.io/ecma262/#sec-ecmascript-data-types-and-values">Type</a></emu-xref>(<var>promise</var>) is not Object, throw a
						<emu-val>TypeError</emu-val> exception.</li>
					<li>Let <var>C</var> be ?
						<emu-xref aoid="SpeciesConstructor" id="_ref_3"><a href="https://tc39.github.io/ecma262/#sec-speciesconstructor">SpeciesConstructor</a></emu-xref>(<var>promise</var>,
						<emu-xref href="#sec-promise-constructor"><a href="https://tc39.github.io/ecma262/#sec-promise-constructor">%Promise%</a></emu-xref>).</li>
					<li>Assert:
						<emu-xref aoid="IsConstructor" id="_ref_4"><a href="https://tc39.github.io/ecma262/#sec-isconstructor">IsConstructor</a></emu-xref>(<var>C</var>) is
						<emu-val>true</emu-val>.</li>
					<li>If
						<emu-xref aoid="IsCallable" id="_ref_5"><a href="https://tc39.github.io/ecma262/#sec-iscallable">IsCallable</a></emu-xref>(<var>onFinally</var>) is
						<emu-val>false</emu-val>,
						<ol>
							<li>Let <var>thenFinally</var> be <var>onFinally</var>.</li>
							<li>Let <var>catchFinally</var> be <var>onFinally</var>.</li>
						</ol>
					</li>
					<li>Else,
						<ol>
							<li>Let <var>thenFinally</var> be a new built-in function object as defined in
								<emu-xref href="#sec-thenfinallyfunction" id="_ref_0"><a href="#sec-thenfinallyfunction">ThenFinally Function</a></emu-xref>.</li>
							<li>Let <var>catchFinally</var> be a new built-in function object as defined in
								<emu-xref href="#sec-catchfinallyfunction" id="_ref_1"><a href="#sec-catchfinallyfunction">CatchFinally Function</a></emu-xref>.</li>
							<li>Set <var>thenFinally</var> and <var>catchFinally</var>'s [[Constructor]] internal slots to <var>C</var>.</li>
							<li>Set <var>thenFinally</var> and <var>catchFinally</var>'s [[OnFinally]] internal slots to <var>onFinally</var>.</li>
						</ol>
					</li>
					<li>Return ?
						<emu-xref aoid="Invoke" id="_ref_6"><a href="https://tc39.github.io/ecma262/#sec-invoke">Invoke</a></emu-xref>(<var>promise</var>, <code>"then"</code>, « <var>thenFinally</var>, <var>catchFinally</var> »).
					</li>
				</ol>
			</emu-alg>

			<emu-clause id="sec-thenfinallyfunction" aoid="ThenFinallyFunction">
				<h1><span class="secnum">1.1</span>ThenFinally Function</h1>
				<p>A ThenFinally function is an anonymous built-in function that has a [[Constructor]] and an [[OnFinally]] internal slot. The value of the [[Constructor]] internal slot is a <code>Promise</code>-like constructor function object, and the value of the [[OnFinally]] internal slot is a function object.</p>
				<p>When a ThenFinally function <var>F</var> is called with argument <var>value</var>, the following steps are taken:</p>
				<emu-alg>
					<ol>
						<li>Let <var>onFinally</var> be <var>F</var>.[[OnFinally]].</li>
						<li>Assert:
							<emu-xref aoid="IsCallable" id="_ref_7"><a href="https://tc39.github.io/ecma262/#sec-iscallable">IsCallable</a></emu-xref>(<var>onFinally</var>) is
							<emu-val>true</emu-val>.</li>
						<li>Let <var>result</var> be ?
							<emu-xref aoid="Call" id="_ref_8"><a href="https://tc39.github.io/ecma262/#sec-call">Call</a></emu-xref>(<var>onFinally</var>,
							<emu-val>undefined</emu-val>).</li>
						<li>Let <var>C</var> be <var>F</var>.[[Constructor]].</li>
						<li>Assert:
							<emu-xref aoid="IsConstructor" id="_ref_9"><a href="https://tc39.github.io/ecma262/#sec-isconstructor">IsConstructor</a></emu-xref>(<var>C</var>) is
							<emu-val>true</emu-val>.</li>
						<li>Let <var>promise</var> be ?
							<emu-xref aoid="PromiseResolve" id="_ref_10"><a href="#sec-promise-resolve">PromiseResolve</a></emu-xref>(<var>C</var>, <var>result</var>).</li>
						<li>Let <var>valueThunk</var> be equivalent to a function that returns <var>value</var>.</li>
						<li>Return ?
							<emu-xref aoid="Invoke" id="_ref_11"><a href="https://tc39.github.io/ecma262/#sec-invoke">Invoke</a></emu-xref>(<var>promise</var>, <code>"then"</code>, « <var>valueThunk</var> »).
						</li>
					</ol>
				</emu-alg>
			</emu-clause>

			<emu-clause id="sec-catchfinallyfunction" aoid="CatchFinallyFunction">
				<h1><span class="secnum">1.2</span>CatchFinally Function</h1>
				<p>A CatchFinally function is an anonymous built-in function that has a [[Constructor]] and an [[OnFinally]] internal slot. The value of the [[Constructor]] internal slot is a <code>Promise</code>-like constructor function object, and the value of the [[OnFinally]] internal slot is a function object.</p>
				<p>When a CatchFinally function <var>F</var> is called with argument <var>reason</var>, the following steps are taken:</p>
				<emu-alg>
					<ol>
						<li>Let <var>onFinally</var> be <var>F</var>.[[OnFinally]].</li>
						<li>Assert:
							<emu-xref aoid="IsCallable" id="_ref_12"><a href="https://tc39.github.io/ecma262/#sec-iscallable">IsCallable</a></emu-xref>(<var>onFinally</var>) is
							<emu-val>true</emu-val>.</li>
						<li>Let <var>result</var> be ?
							<emu-xref aoid="Call" id="_ref_13"><a href="https://tc39.github.io/ecma262/#sec-call">Call</a></emu-xref>(<var>onFinally</var>,
							<emu-val>undefined</emu-val>).</li>
						<li>Let <var>C</var> be <var>F</var>.[[Constructor]].</li>
						<li>Assert:
							<emu-xref aoid="IsConstructor" id="_ref_14"><a href="https://tc39.github.io/ecma262/#sec-isconstructor">IsConstructor</a></emu-xref>(<var>C</var>) is
							<emu-val>true</emu-val>.</li>
						<li>Let <var>promise</var> be ?
							<emu-xref aoid="PromiseResolve" id="_ref_15"><a href="#sec-promise-resolve">PromiseResolve</a></emu-xref>(<var>C</var>, <var>result</var>).</li>
						<li>Let <var>thrower</var> be equivalent to a function that throws <var>reason</var>.</li>
						<li>Return ?
							<emu-xref aoid="Invoke" id="_ref_16"><a href="https://tc39.github.io/ecma262/#sec-invoke">Invoke</a></emu-xref>(<var>promise</var>, <code>"then"</code>, « <var>thrower</var> »).
						</li>
					</ol>
				</emu-alg>
			</emu-clause>
		</emu-clause>

		<!-- es6num="25.4.4.5" -->
		<emu-clause id="sec-promise.resolve">
			<h1><span class="secnum">2</span>Promise.resolve ( <var>x</var> )</h1>
			<p>The <code>resolve</code> function returns either a new promise resolved with the passed argument, or the argument itself if the argument is a promise produced by this constructor.</p>
			<emu-alg>
				<ol>
					<li>Let <var>C</var> be the
						<emu-val>this</emu-val> value.</li>
					<li>If
						<emu-xref aoid="Type" id="_ref_17"><a href="https://tc39.github.io/ecma262/#sec-ecmascript-data-types-and-values">Type</a></emu-xref>(<var>C</var>) is not Object, throw a
						<emu-val>TypeError</emu-val> exception.</li>
					<li>Return ?
						<emu-xref aoid="PromiseResolve" id="_ref_18"><a href="#sec-promise-resolve">PromiseResolve</a></emu-xref>(<var>C</var>, <var>x</var>).
					</li>
				</ol>
			</emu-alg>
			<emu-note><span class="note">Note</span>
				<div class="note-contents">
					<p>The <code>resolve</code> function expects its
						<emu-val>this</emu-val> value to be a constructor function that supports the parameter conventions of the <code>Promise</code> constructor.</p>
				</div>
			</emu-note>
		</emu-clause>

		<emu-clause id="sec-promise-resolve" aoid="PromiseResolve">
			<h1><span class="secnum">3</span>PromiseResolve ( <var>C</var>, <var>x</var> )</h1>
			<p>The abstract operation PromiseResolve, given a constructor and a value, returns a new promise resolved with that value.</p>
			<emu-alg>
				<ol>
					<li>Assert:
						<emu-xref aoid="Type" id="_ref_19"><a href="https://tc39.github.io/ecma262/#sec-ecmascript-data-types-and-values">Type</a></emu-xref>(<var>C</var>) is Object.</li>
					<li>If
						<emu-xref aoid="IsPromise" id="_ref_20"><a href="https://tc39.github.io/ecma262/#sec-ispromise">IsPromise</a></emu-xref>(<var>x</var>) is
						<emu-val>true</emu-val>, then
						<ol>
							<li>Let <var>xConstructor</var> be ?
								<emu-xref aoid="Get" id="_ref_21"><a href="https://tc39.github.io/ecma262/#sec-get-o-p">Get</a></emu-xref>(<var>x</var>, <code>"constructor"</code>).</li>
							<li>If
								<emu-xref aoid="SameValue" id="_ref_22"><a href="https://tc39.github.io/ecma262/#sec-samevalue">SameValue</a></emu-xref>(<var>xConstructor</var>, <var>C</var>) is
								<emu-val>true</emu-val>, return <var>x</var>.</li>
						</ol>
					</li>
					<li>Let <var>promiseCapability</var> be ?
						<emu-xref aoid="NewPromiseCapability" id="_ref_23"><a href="https://tc39.github.io/ecma262/#sec-newpromisecapability">NewPromiseCapability</a></emu-xref>(<var>C</var>).</li>
					<li>Perform ?
						<emu-xref aoid="Call" id="_ref_24"><a href="https://tc39.github.io/ecma262/#sec-call">Call</a></emu-xref>(<var>promiseCapability</var>.[[Resolve]],
						<emu-val>undefined</emu-val>, « <var>x</var> »).</li>
					<li>Return <var>promiseCapability</var>.[[Promise]].
					</li>
				</ol>
			</emu-alg>
		</emu-clause>
		<emu-annex id="sec-copyright-and-software-license">
			<h1><span class="secnum">A</span>Copyright &amp; Software License</h1>

			<h2>Copyright Notice</h2>
			<p>© 2018 Jordan Harband</p>

			<h2>Software License</h2>
			<p>All Software contained in this document ("Software") is protected by copyright and is being made available under the "BSD License", included below. This Software may be subject to third party rights (rights from parties other than Ecma International), including patent rights, and no licenses under such third party rights are granted under this license even if the third party concerned is a member of Ecma International. SEE THE ECMA CODE OF CONDUCT IN PATENT MATTERS AVAILABLE AT http://www.ecma-international.org/memento/codeofconduct.htm FOR INFORMATION REGARDING THE LICENSING OF PATENT CLAIMS THAT ARE REQUIRED TO IMPLEMENT ECMA INTERNATIONAL STANDARDS.</p>

			<p>Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:</p>

			<ol>
				<li>Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.</li>
				<li>Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.</li>
				<li>Neither the name of the authors nor Ecma International may be used to endorse or promote products derived from this software without specific prior written permission.</li>
			</ol>

			<p>THIS SOFTWARE IS PROVIDED BY THE ECMA INTERNATIONAL "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ECMA INTERNATIONAL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</p>

		</emu-annex>
	</div>
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