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<head><meta charset="utf-8"><title>String.prototype.codePoints</title><script type="application/json" id="menu-search-biblio">[{"type":"clause","id":"sec-string.prototype-@@iterator","aoid":null,"title":"String.prototype [ @@iterator ] ( )","titleHTML":"String.prototype [ @@iterator ] ( )","number":"1.1","namespace":"<no location>","location":"","referencingIds":[],"key":"String.prototype [ @@iterator ] ( )"},{"type":"clause","id":"sec-string.prototype-codepoints","aoid":null,"title":"String.prototype.codePoints ( )","titleHTML":"String.prototype.codePoints ( )","number":"1.2","namespace":"<no location>","location":"","referencingIds":[],"key":"String.prototype.codePoints ( )"},{"type":"clause","id":"sec-properties-of-the-string-prototype-object","aoid":null,"title":"Properties of the String Prototype Object","titleHTML":"Properties of the String Prototype Object","number":"1","namespace":"<no location>","location":"","referencingIds":[],"key":"Properties of the String Prototype Object"},{"type":"op","aoid":"CreateStringIterator","refId":"sec-createstringiterator","location":"","referencingIds":[],"key":"CreateStringIterator"},{"type":"clause","id":"sec-createstringiterator","aoid":"CreateStringIterator","title":"CreateStringIterator ( string,  kind )","titleHTML":"CreateStringIterator ( <var>string</var>,  <ins><var>kind</var></ins> )","number":"2.1","namespace":"<no location>","location":"","referencingIds":["_ref_4","_ref_7"],"key":"CreateStringIterator ( string,  kind )"},{"type":"clause","id":"sec-%stringiteratorprototype%.next","aoid":null,"title":"%StringIteratorPrototype%.next ( )","titleHTML":"%StringIteratorPrototype%.next ( )","number":"2.2.1","namespace":"<no location>","location":"","referencingIds":[],"key":"%StringIteratorPrototype%.next ( )"},{"type":"clause","id":"sec-%stringiteratorprototype%-object","aoid":null,"title":"The %StringIteratorPrototype% Object","titleHTML":"The %StringIteratorPrototype% Object","number":"2.2","namespace":"<no location>","location":"","referencingIds":["_ref_10","_ref_27"],"key":"The %StringIteratorPrototype% Object"},{"type":"table","id":"table-46","number":1,"caption":"Table 1: Internal Slots of String Iterator Instances","referencingIds":["_ref_1"],"namespace":"<no location>","location":"","key":"Table 1: Internal Slots of String Iterator Instances"},{"type":"clause","id":"sec-properties-of-string-iterator-instances","aoid":null,"title":"Properties of String Iterator Instances","titleHTML":"Properties of String Iterator Instances","number":"2.3","namespace":"<no location>","location":"","referencingIds":["_ref_0"],"key":"Properties of String Iterator Instances"},{"type":"clause","id":"sec-string-iterator-objects","aoid":null,"title":"String Iterator Objects","titleHTML":"String Iterator Objects","number":"2","namespace":"<no location>","location":"","referencingIds":[],"key":"String Iterator Objects"},{"type":"clause","id":"sec-copyright-and-software-license","aoid":null,"title":"Copyright & Software License","titleHTML":"Copyright &amp; Software License","number":"A","namespace":"<no location>","location":"","referencingIds":[],"key":"Copyright & Software License"}]</script><script>"use strict";

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function debounce(fn, opts) {
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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 = {
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    this.$permalink.textContent = 'Permalink';
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    this.$pinLink.textContent = 'Pin';
    this.$pinLink.setAttribute('href', '#');
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      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) {
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    this.active = true;
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  findReferenceUnder: function (el) {
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var referencePane = {
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    this.$pane = document.createElement('div');
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    this.$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;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;;

  cursor: pointer;
}

#menu {
  display: flex;
  flex-direction: column;
  width: 33%; height: 100vh;
  max-width: 500px;
  box-sizing: border-box;
  background-color: #ddd;
  overflow: hidden;
  transition: opacity 0.1s linear;
  padding: 0 5px;
  position: fixed;
  left: 0; top: 0;
  border-right: 2px solid #bbb;

  z-index: 2;
}

#menu-spacer {
  flex-basis: 33%;
  max-width: 500px;
  flex-grow: 0;
  flex-shrink: 0;
}

#menu a {
  color: #1567a2;
}

#menu.active {
  display: flex;
  opacity: 1;
  z-index: 2;
}

#menu-pins {
  flex-grow: 1;
  display: none;
}

#menu-pins.active {
  display: block;
}

#menu-pins-list {
  margin: 0;
  padding: 0;
  counter-reset: pins-counter;
}

#menu-pins-list > li:before {
  content: counter(pins-counter);
  counter-increment: pins-counter;
  display: inline-block;
  width: 25px;
  text-align: center;
  border: 1px solid #bbb;
  padding: 2px;
  margin: 4px;
  box-sizing: border-box;
  line-height: 1em;
  background-color: #ccc;
  border-radius: 4px;
}
#menu-toc > ol {
  padding: 0;
  flex-grow: 1;
}

#menu-toc > ol li {
  padding: 0;
}

#menu-toc > ol , #menu-toc > ol ol {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

#menu-toc > ol ol {
  padding-left: 0.75em;
}

#menu-toc li {
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

#menu-toc .item-toggle {
  display: inline-block;
  transform: rotate(-45deg) translate(-5px, -5px);
  transition: transform 0.1s ease;
  text-align: center;
  width: 20px;

  color: #aab;

  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;;

  cursor: pointer;
}

#menu-toc .item-toggle-none {
  display: inline-block;
  width: 20px;
}

#menu-toc li.active > .item-toggle {
  transform: rotate(45deg) translate(-5px, -5px);
}

#menu-toc li > ol {
  display: none;
}

#menu-toc li.active > ol {
  display: block;
}

#menu-toc li.revealed > a {
  background-color: #bbb;
  font-weight: bold;
  /*
  background-color: #222;
  color: #c6d8e4;
  */
}

#menu-toc li.revealed-leaf> a {
  color: #206ca7;
  /*
  background-color: #222;
  color: #c6d8e4;
  */
}

#menu-toc li.revealed > .item-toggle {
  transform: rotate(45deg) translate(-5px, -5px);
}

#menu-toc li.revealed > ol {
  display: block;
}

#menu-toc li > a {
  padding: 2px 5px;
}

#menu > * {
  margin-bottom: 5px;
}

.menu-pane-header {
  padding: 0 5px;
  text-transform: uppercase;
  background-color: #aaa;
  color: #335;
  font-weight: bold;
  letter-spacing: 2px;
  flex-grow: 0;
  flex-shrink: 0;
  font-size: 0.8em;
}

#menu-toc {
  display: flex;
  flex-direction: column;
  width: 100%;
  overflow: hidden;
  flex-grow: 1;
}

#menu-toc ol.toc {
  overflow-x: hidden;
  overflow-y: auto;
}

#menu-search {
  position: relative;
  flex-grow: 0;
  flex-shrink: 0;
  width: 100%;
  
  display: flex;
  flex-direction: column;
  
  max-height: 300px;
}

#menu-trace-list {
  display: none;
}

#menu-search-box {
  box-sizing: border-box;
  display: block;
  width: 100%;
  margin: 5px 0 0 0;
  font-size: 1em;
  padding: 2px;
  background-color: #bbb;
  border: 1px solid #999;
}

#menu-search-results {
  overflow-x: hidden;
  overflow-y: auto;
}

li.menu-search-result-clause:before {
    content: 'clause';
    width: 40px;
    display: inline-block;
    text-align: right;
    padding-right: 1ex;
    color: #666;
    font-size: 75%;
}
li.menu-search-result-op:before {
    content: 'op';
    width: 40px;
    display: inline-block;
    text-align: right;
    padding-right: 1ex;
    color: #666;
    font-size: 75%;
}

li.menu-search-result-prod:before {
    content: 'prod';
    width: 40px;
    display: inline-block;
    text-align: right;
    padding-right: 1ex;
    color: #666;
    font-size: 75%
}


li.menu-search-result-term:before {
    content: 'term';
    width: 40px;
    display: inline-block;
    text-align: right;
    padding-right: 1ex;
    color: #666;
    font-size: 75%
}

#menu-search-results ul {
  padding: 0 5px;
  margin: 0;
}

#menu-search-results li {
  white-space: nowrap;
  text-overflow: ellipsis;
}


#menu-trace-list {
  counter-reset: item;
  margin: 0 0 0 20px;
  padding: 0;
}
#menu-trace-list li {
  display: block;
  white-space: nowrap;
}

#menu-trace-list li .secnum:after {
  content: " ";
}
#menu-trace-list li:before {
    content: counter(item) " ";
    background-color: #222;
    counter-increment: item;
    color: #999;
    width: 20px;
    height: 20px;
    line-height: 20px;
    display: inline-block;
    text-align: center;
    margin: 2px 4px 2px 0;
}

@media (max-width: 1000px) {
  body {
    margin: 0;
    display: block;
  }

  #menu {
    display: none;
    padding-top: 3em;
    width: 450px;
  }

  #menu.active {
    position: fixed;
    height: 100%;
    left: 0;
    top: 0;
    right: 300px;
  }

  #menu-toggle {
    visibility: visible;
  }

  #spec-container {
    padding: 0 5px;
  }

  #references-pane-spacer {
    display: none;
  }
}

@media only screen and (max-width: 800px) {
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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-properties-of-the-string-prototype-object" title="Properties of the String Prototype Object"><span class="secnum">1</span> Properties of the String Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-string.prototype-@@iterator" title="String.prototype [ @@iterator ] ( )"><span class="secnum">1.1</span> String.prototype [ @@iterator ] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype-codepoints" title="String.prototype.codePoints ( )"><span class="secnum">1.2</span> String.prototype.codePoints ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-string-iterator-objects" title="String Iterator Objects"><span class="secnum">2</span> String Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createstringiterator" title="CreateStringIterator ( string,  kind )"><span class="secnum">2.1</span> CreateStringIterator ( <var>string</var>,  <ins><var>kind</var></ins> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%stringiteratorprototype%-object" title="The %StringIteratorPrototype% Object"><span class="secnum">2.2</span> The %StringIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%stringiteratorprototype%.next" title="%StringIteratorPrototype%.next ( )"><span class="secnum">2.2.1</span> %StringIteratorPrototype%.next ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-string-iterator-instances" title="Properties of String Iterator Instances"><span class="secnum">2.3</span> Properties of String Iterator 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 first">Stage 1 Draft / May 19, 2018</h1><h1 class="title">String.prototype.codePoints</h1>

<!-- es6num="21.1.3" -->
<emu-clause id="sec-properties-of-the-string-prototype-object">
	<h1><span class="secnum">1</span>Properties of the String Prototype Object</h1>

	<!-- es6num="21.1.3.27" -->
	<emu-clause id="sec-string.prototype-@@iterator">
		<h1><span class="secnum">1.1</span>String.prototype [ @@iterator ] ( )</h1>
		<p>When the @@iterator method is called it returns an Iterator object (<emu-xref href="#sec-iterator-interface"><a href="https://tc39.github.io/ecma262/#sec-iterator-interface">25.1.1.2</a></emu-xref>) that iterates over the code points of a String value, returning each code point as a String value. The following steps are taken:</p>
		<emu-alg><ol><li>Let <var>O</var> be ?&nbsp;<emu-xref aoid="RequireObjectCoercible" id="_ref_2"><a href="https://tc39.github.io/ecma262/#sec-requireobjectcoercible">RequireObjectCoercible</a></emu-xref>(<emu-val>this</emu-val> value).</li><li>Let <var>S</var> be ?&nbsp;<emu-xref aoid="ToString" id="_ref_3"><a href="https://tc39.github.io/ecma262/#sec-tostring">ToString</a></emu-xref>(<var>O</var>).</li><li>Return <emu-xref aoid="CreateStringIterator" id="_ref_4"><a href="#sec-createstringiterator">CreateStringIterator</a></emu-xref>(<var>S</var>, <ins><code>"string"</code></ins>).
		</li></ol></emu-alg>
		<p>The value of the <code>name</code> property of this function is <code>"[Symbol.iterator]"</code>.</p>
	</emu-clause>

	<ins class="block">
	<!-- es6num="21.1.3.28" -->
	<emu-clause id="sec-string.prototype-codepoints">
			<h1><span class="secnum">1.2</span>String.prototype.codePoints ( )</h1>
			<p>When the <code>codePoints</code> method is called it returns an Iterator object (<emu-xref href="#sec-iterator-interface"><a href="https://tc39.github.io/ecma262/#sec-iterator-interface">25.1.1.2</a></emu-xref>) that iterates over the code points of a String value, returning a descriptor consisting of position within a string and code point itself as a Number value. The following steps are taken:</p>
			<emu-alg><ol><li>Let <var>O</var> be ?&nbsp;<emu-xref aoid="RequireObjectCoercible" id="_ref_5"><a href="https://tc39.github.io/ecma262/#sec-requireobjectcoercible">RequireObjectCoercible</a></emu-xref>(<emu-val>this</emu-val> value).</li><li>Let <var>S</var> be ?&nbsp;<emu-xref aoid="ToString" id="_ref_6"><a href="https://tc39.github.io/ecma262/#sec-tostring">ToString</a></emu-xref>(<var>O</var>).</li><li>Return <emu-xref aoid="CreateStringIterator" id="_ref_7"><a href="#sec-createstringiterator">CreateStringIterator</a></emu-xref>(<var>S</var>, <ins><code>"descriptor"</code></ins>).
			</li></ol></emu-alg>
	</emu-clause>
	</ins>
</emu-clause>

<!-- es6num="21.1.5" -->
<emu-clause id="sec-string-iterator-objects">
	<h1><span class="secnum">2</span>String Iterator Objects</h1>

	<!-- es6num="21.1.5.1" -->
	<emu-clause id="sec-createstringiterator" aoid="CreateStringIterator">
		<h1><span class="secnum">2.1</span>CreateStringIterator ( <var>string</var>,  <ins><var>kind</var></ins> )</h1>
		<p>Several methods of String objects return Iterator objects. The abstract operation CreateStringIterator with argument <var>string</var> is used to create such iterator objects. It performs the following steps:</p>
		<emu-alg><ol><li>Assert: <emu-xref aoid="Type" id="_ref_8"><a href="https://tc39.github.io/ecma262/#sec-ecmascript-data-types-and-values">Type</a></emu-xref>(<var>string</var>) is String.</li><li>Let <var>iterator</var> be <emu-xref aoid="ObjectCreate" id="_ref_9"><a href="https://tc39.github.io/ecma262/#sec-objectcreate">ObjectCreate</a></emu-xref>(<emu-xref href="#sec-%stringiteratorprototype%-object" id="_ref_10"><a href="#sec-%stringiteratorprototype%-object">%StringIteratorPrototype%</a></emu-xref>, « [[IteratedString]], [[StringIteratorNextIndex]] »).</li><li>Set <var>iterator</var>.[[IteratedString]] to <var>string</var>.</li><li>Set <var>iterator</var>.[[StringIteratorNextIndex]] to 0.</li><li><ins>Set <var>iterator</var>.[[StringIterationKind]] to <var>kind</var>.</ins></li><li>Return <var>iterator</var>.
		</li></ol></emu-alg>
	</emu-clause>

	<!-- es6num="21.1.5.2" -->
	<emu-clause id="sec-%stringiteratorprototype%-object">
		<h1><span class="secnum">2.2</span>The %StringIteratorPrototype% Object</h1>

		<!-- es6num="21.1.5.2.1" -->
		<emu-clause id="sec-%stringiteratorprototype%.next">
			<h1><span class="secnum">2.2.1</span>%StringIteratorPrototype%.next ( )</h1>
			<emu-alg><ol><li>Let <var>O</var> be the <emu-val>this</emu-val> value.</li><li>If <emu-xref aoid="Type" id="_ref_11"><a href="https://tc39.github.io/ecma262/#sec-ecmascript-data-types-and-values">Type</a></emu-xref>(<var>O</var>) is not Object, throw a <emu-val>TypeError</emu-val> exception.</li><li>If <var>O</var> does not have all of the internal slots of a String Iterator Instance (<emu-xref href="#sec-properties-of-string-iterator-instances" id="_ref_0"><a href="#sec-properties-of-string-iterator-instances">2.3</a></emu-xref>), throw a <emu-val>TypeError</emu-val> exception.</li><li>Let <var>s</var> be <var>O</var>.[[IteratedString]].</li><li>If <var>s</var> is <emu-val>undefined</emu-val>, return <emu-xref aoid="CreateIterResultObject" id="_ref_12"><a href="https://tc39.github.io/ecma262/#sec-createiterresultobject">CreateIterResultObject</a></emu-xref>(<emu-val>undefined</emu-val>, <emu-val>true</emu-val>).</li><li>Let <var>position</var> be <var>O</var>.[[StringIteratorNextIndex]].</li><li>Let <var>len</var> be the length of <var>s</var>.</li><li>If <var>position</var> <del>≥</del> <ins>==</ins> <var>len</var>, then<ol><li>Set <var>O</var>.[[IteratedString]] to <emu-val>undefined</emu-val>.</li><li><ins>If <var>itemKind</var> is <code>"string"</code>, let <var>result</var> be <emu-val>undefined</emu-val>.</ins></li><li><ins>Else,</ins><ol><li><ins>Assert: <var>itemKind</var> is <code>"descriptor"</code>.</ins></li><li><ins>Let <var>result</var> be <emu-xref aoid="ObjectCreate" id="_ref_13"><a href="https://tc39.github.io/ecma262/#sec-objectcreate">ObjectCreate</a></emu-xref>(<emu-xref href="#sec-properties-of-the-object-prototype-object"><a href="https://tc39.github.io/ecma262/#sec-properties-of-the-object-prototype-object">%ObjectPrototype%</a></emu-xref>).</ins></li><li><ins>Perform <emu-xref aoid="CreateDataProperty" id="_ref_14"><a href="https://tc39.github.io/ecma262/#sec-createdataproperty">CreateDataProperty</a></emu-xref>(<var>result</var>, <code>"position"</code>, <var>len</var>).</ins></li><li><ins>Perform <emu-xref aoid="CreateDataProperty" id="_ref_15"><a href="https://tc39.github.io/ecma262/#sec-createdataproperty">CreateDataProperty</a></emu-xref>(<var>result</var>, <code>"codePoint"</code>, <emu-val>undefined</emu-val>).</ins></li></ol></li><li><del>Return <emu-xref aoid="CreateIterResultObject" id="_ref_16"><a href="https://tc39.github.io/ecma262/#sec-createiterresultobject">CreateIterResultObject</a></emu-xref>(<emu-val>undefined</emu-val>, <emu-val>true</emu-val>)</del>.</li><li><ins>Return <emu-xref aoid="CreateIterResultObject" id="_ref_17"><a href="https://tc39.github.io/ecma262/#sec-createiterresultobject">CreateIterResultObject</a></emu-xref>(<var>result</var>, <emu-val>true</emu-val>)</ins>.</li></ol></li><li><ins>Let <var>itemKind</var> be <var>O</var>.[[StringIterationKind]].</ins></li><li>Let <var>first</var> be the numeric value of the code unit at index <var>position</var> within <var>s</var>.</li><li><del>If <var>first</var> &lt; 0xD800 or <var>first</var> &gt; 0xDBFF or <var>position</var>+1 = <var>len</var>, let <var>resultString</var> be the String value consisting of the single code unit <var>first</var>.</del></li><li><ins>If <var>first</var> ≥ 0xD800 and <var>first</var> ≤ 0xDBFF and <var>position</var>+1 &lt; <var>len</var>, then<ol><li>Let <var>second</var> be the numeric value of the code unit at index <var>position</var>+1 within the String <var>S</var>.</li><li><del>If <var>second</var> &lt; 0xDC00 or <var>second</var> &gt; 0xDFFF, let <var>resultString</var> be the String value consisting of the single code unit <var>first</var>.</del></li><li><del>Else, let <var>resultString</var> be the string-concatenation of the code unit <var>first</var> and the code unit <var>second</var>.</del></li><li><ins>If <var>second</var> ≥ 0xDC00 and <var>second</var> ≤ 0xDFFF, then</ins><ol><li><ins>Set <var>O</var>.[[StringIteratorNextIndex]] to <var>position</var> + 2.</ins></li><li><ins>If <var>itemKind</var> is <code>"string"</code>, let <var>result</var> be the string-concatenation of the code unit <var>first</var> and the code unit <var>second</var>.</ins></li><li><ins>Else,</ins><ol><li><ins>Assert: <var>itemKind</var> is <code>"descriptor"</code>.</ins></li><li><ins>Let <var>resultCp</var> be <emu-xref aoid="UTF16Decode" id="_ref_18"><a href="https://tc39.github.io/ecma262/#sec-utf16decode">UTF16Decode</a></emu-xref>(<var>first</var>, <var>second</var>).</ins></li><li><ins>Let <var>result</var> be <emu-xref aoid="ObjectCreate" id="_ref_19"><a href="https://tc39.github.io/ecma262/#sec-objectcreate">ObjectCreate</a></emu-xref>(<emu-xref href="#sec-properties-of-the-object-prototype-object"><a href="https://tc39.github.io/ecma262/#sec-properties-of-the-object-prototype-object">%ObjectPrototype%</a></emu-xref>).</ins></li><li><ins>Perform <emu-xref aoid="CreateDataProperty" id="_ref_20"><a href="https://tc39.github.io/ecma262/#sec-createdataproperty">CreateDataProperty</a></emu-xref>(<var>result</var>, <code>"position"</code>, <var>position</var>).</ins></li><li><ins>Perform <emu-xref aoid="CreateDataProperty" id="_ref_21"><a href="https://tc39.github.io/ecma262/#sec-createdataproperty">CreateDataProperty</a></emu-xref>(<var>result</var>, <code>"codePoint"</code>, <var>resultCp</var>).</ins></li></ol></li><li><ins>Return <emu-xref aoid="CreateIterResultObject" id="_ref_22"><a href="https://tc39.github.io/ecma262/#sec-createiterresultobject">CreateIterResultObject</a></emu-xref>(<var>result</var>, <emu-val>false</emu-val>).</ins></li></ol></li></ol></ins></li><li><del>Let <var>resultSize</var> be the number of code units in <var>resultString</var>.</del></li><li><del>Set <var>O</var>.[[StringIteratorNextIndex]] to <var>position</var> + <var>resultSize</var>.</del></li><li><ins>Set <var>O</var>.[[StringIteratorNextIndex]] to <var>position</var> + 1.</ins></li><li><ins>If <var>itemKind</var> is <code>"string"</code>, let <var>result</var> be the String value consisting of the single code unit <var>first</var>.</ins></li><li><ins>Else,</ins><ol><li><ins>Assert: <var>itemKind</var> is <code>"descriptor"</code>.</ins></li><li><ins>Let <var>result</var> be <emu-xref aoid="ObjectCreate" id="_ref_23"><a href="https://tc39.github.io/ecma262/#sec-objectcreate">ObjectCreate</a></emu-xref>(<emu-xref href="#sec-properties-of-the-object-prototype-object"><a href="https://tc39.github.io/ecma262/#sec-properties-of-the-object-prototype-object">%ObjectPrototype%</a></emu-xref>).</ins></li><li><ins>Perform <emu-xref aoid="CreateDataProperty" id="_ref_24"><a href="https://tc39.github.io/ecma262/#sec-createdataproperty">CreateDataProperty</a></emu-xref>(<var>result</var>, <code>"position"</code>, <var>position</var>).</ins></li><li><ins>Perform <emu-xref aoid="CreateDataProperty" id="_ref_25"><a href="https://tc39.github.io/ecma262/#sec-createdataproperty">CreateDataProperty</a></emu-xref>(<var>result</var>, <code>"codePoint"</code>, <var>first</var>).</ins></li></ol></li><li><ins>Return <emu-xref aoid="CreateIterResultObject" id="_ref_26"><a href="https://tc39.github.io/ecma262/#sec-createiterresultobject">CreateIterResultObject</a></emu-xref>(<del><var>resultString</var></del><ins><var>result</var></ins>, <emu-val>false</emu-val>).</ins>
			</li></ol></emu-alg>
		</emu-clause>
	</emu-clause>

	<!-- es6num="21.1.5.3" -->
	<emu-clause id="sec-properties-of-string-iterator-instances">
		<h1><span class="secnum">2.3</span>Properties of String Iterator Instances</h1>
		<p>String Iterator instances are ordinary objects that inherit properties from the <emu-xref href="#sec-%stringiteratorprototype%-object" id="_ref_27"><a href="#sec-%stringiteratorprototype%-object">%StringIteratorPrototype%</a></emu-xref> intrinsic object. String Iterator instances are initially created with the internal slots listed in  <emu-xref href="#table-46" id="_ref_1"><a href="#table-46">Table 1</a></emu-xref>.</p>
		<emu-table id="table-46" caption="Internal Slots of String Iterator Instances"><figure><figcaption>Table 1: Internal Slots of String Iterator Instances</figcaption>
			<table>
				<tbody>
				<tr>
					<th>
						Internal Slot
					
					</th>
					<th>
						Description
					
					</th>
				</tr>
				<tr>
					<td>
						[[IteratedString]]
					
					</td>
					<td>
						The String value whose elements are being iterated.
					
					</td>
				</tr>
				<tr>
					<td>
						[[StringIteratorNextIndex]]
					
					</td>
					<td>
						The integer index of the next string index to be examined by this iteration.
					
					</td>
				</tr>
				<tr>
					<td>
						<ins>[[StringIterationKind]]</ins>
					</td>
					<td>
						<ins>A String value that identifies what is to be returned for each element of the iteration. The possible values are: <code>"string"</code>, <code>"descriptor"</code>.</ins>
					</td>
				</tr>
				</tbody>
			</table>
		</figure></emu-table>
	</emu-clause>
</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 Ingvar Stepanyan</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 https://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></body>