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----
-title: String.fromCodePoint()
-slug: Web/JavaScript/Reference/Global_Objects/String/fromCodePoint
-translation_of: Web/JavaScript/Reference/Global_Objects/String/fromCodePoint
-original_slug: Web/JavaScript/Referencje/Obiekty/String/fromCodePoint
----
-<div>{{JSRef}}</div>
-
-<p>The static <strong><code>String.fromCodePoint()</code></strong> method returns a string created by using the specified sequence of code points.</p>
-
-<div>{{EmbedInteractiveExample("pages/js/string-fromcodepoint.html","shorter")}}</div>
-
-
-
-<h2 id="Syntax">Syntax</h2>
-
-<pre class="syntaxbox notranslate">String<code>.fromCodePoint(<var>num1</var>[, ...[, <var>numN</var>]])</code></pre>
-
-<h3 id="Parameters">Parameters</h3>
-
-<dl>
- <dt><code><var>num1</var>, ..., <var>numN</var></code></dt>
- <dd>A sequence of code points.</dd>
-</dl>
-
-<h3 id="Return_value">Return value</h3>
-
-<p>A string created by using the specified sequence of code points.</p>
-
-<h3 id="Exceptions">Exceptions</h3>
-
-<ul>
- <li>A {{jsxref("Errors/Not_a_codepoint", "RangeError")}} is thrown if an invalid Unicode code point is given (e.g. <code>"RangeError: NaN is not a valid code point"</code>).</li>
-</ul>
-
-<h2 id="Description">Description</h2>
-
-<p>This method returns a string (and <em>not</em> a {{jsxref("String")}} object).</p>
-
-<p>Because <code>fromCodePoint()</code> is a static method of {{jsxref("String")}}, you must call it as <code>String.fromCodePoint()</code>, rather than as a method of a {{jsxref("String")}} object you created.</p>
-
-<h2 id="Polyfill">Polyfill</h2>
-
-<p>The <code>String.fromCodePoint()</code> method has been added to ECMAScript 2015 and may not be supported in all web browsers or environments yet.</p>
-
-<p>Use the code below for a polyfill:</p>
-
-<pre class="brush: js notranslate">if (!String.fromCodePoint) (function(stringFromCharCode) {
-    var fromCodePoint = function(_) {
-      var codeUnits = [], codeLen = 0, result = "";
-      for (var index=0, len = arguments.length; index !== len; ++index) {
-        var codePoint = +arguments[index];
-        // correctly handles all cases including `NaN`, `-Infinity`, `+Infinity`
-        // The surrounding `!(...)` is required to correctly handle `NaN` cases
-        // The (codePoint&gt;&gt;&gt;0) === codePoint clause handles decimals and negatives
-        if (!(codePoint &lt; 0x10FFFF &amp;&amp; (codePoint&gt;&gt;&gt;0) === codePoint))
-          throw RangeError("Invalid code point: " + codePoint);
-        if (codePoint &lt;= 0xFFFF) { // BMP code point
-          codeLen = codeUnits.push(codePoint);
-        } else { // Astral code point; split in surrogate halves
-          // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-          codePoint -= 0x10000;
-          codeLen = codeUnits.push(
-            (codePoint &gt;&gt; 10) + 0xD800,  // highSurrogate
-            (codePoint % 0x400) + 0xDC00 // lowSurrogate
-          );
-        }
-        if (codeLen &gt;= 0x3fff) {
-          result += stringFromCharCode.apply(null, codeUnits);
-          codeUnits.length = 0;
-        }
-      }
-      return result + stringFromCharCode.apply(null, codeUnits);
-    };
-    try { // IE 8 only supports `Object.defineProperty` on DOM elements
-      Object.defineProperty(String, "fromCodePoint", {
-        "value": fromCodePoint, "configurable": true, "writable": true
-      });
-    } catch(e) {
-      String.fromCodePoint = fromCodePoint;
-    }
-}(String.fromCharCode));
-</pre>
-
-<h2 id="Examples">Examples</h2>
-
-<h3 id="Using_fromCodePoint">Using <code>fromCodePoint()</code></h3>
-
-<p>Valid input:</p>
-
-<pre class="brush: js notranslate">String.fromCodePoint(42);       // "*"
-String.fromCodePoint(65, 90);   // "AZ"
-String.fromCodePoint(0x404);    // "\u0404" == "Є"
-String.fromCodePoint(0x2F804);  // "\uD87E\uDC04"
-String.fromCodePoint(194564);   // "\uD87E\uDC04"
-String.fromCodePoint(0x1D306, 0x61, 0x1D307); // "\uD834\uDF06a\uD834\uDF07"
-</pre>
-
-<p>Invalid input:</p>
-
-<pre class="brush: js notranslate">String.fromCodePoint('_');      // RangeError
-String.fromCodePoint(Infinity); // RangeError
-String.fromCodePoint(-1);       // RangeError
-String.fromCodePoint(3.14);     // RangeError
-String.fromCodePoint(3e-2);     // RangeError
-String.fromCodePoint(NaN);      // RangeError
-</pre>
-
-<h3 id="Compared_to_fromCharCode">Compared to <code>fromCharCode()</code></h3>
-
-<p>{{jsxref("String.fromCharCode()")}} cannot return supplementary characters (i.e. code points <code>0x010000</code> – <code>0x10FFFF</code>) by specifying their code point. Instead, it requires the UTF-16 surrogate pair in order to return a supplementary character:</p>
-
-<pre class="brush: js notranslate">String.fromCharCode(0xD83C, 0xDF03); // Code Point U+1F303 "Night with
-String.fromCharCode(55356, 57091);   // Stars" == "\uD83C\uDF03"
-</pre>
-
-<p><code>String.fromCodePoint()</code>, on the other hand, can return 4-byte supplementary characters, as well as the more common 2-byte BMP characters, by specifying their code point (which is equivalent to the UTF-32 code unit):</p>
-
-<pre class="brush: js notranslate">String.fromCodePoint(0x1F303); // or 127747 in decimal
-</pre>
-
-<h2 id="Specifications">Specifications</h2>
-
-<table class="standard-table">
- <thead>
-  <tr>
-   <th scope="col">Specification</th>
-  </tr>
- </thead>
- <tbody>
-  <tr>
-   <td>{{SpecName('ESDraft', '#sec-string.fromcodepoint', 'String.fromCodePoint')}}</td>
-  </tr>
- </tbody>
-</table>
-
-<h2 id="Browser_compatibility">Browser compatibility</h2>
-
-<p>{{Compat("javascript.builtins.String.fromCodePoint")}}</p>
-
-<h2 id="See_also">See also</h2>
-
-<ul>
- <li>{{jsxref("String.fromCharCode()")}}</li>
- <li>{{jsxref("String.prototype.charAt()")}}</li>
- <li>{{jsxref("String.prototype.codePointAt()")}}</li>
- <li>{{jsxref("String.prototype.charCodeAt()")}}</li>
-</ul>