<?xml version="1.0"?>

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  Copyright (C) Nginx, Inc.
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<!DOCTYPE article SYSTEM "../../../../dtd/article.dtd">

<article name="Compatibility"
        link="/en/docs/njs/compatibility.html"
        lang="en"
        rev="36"
        toc="no">

<section>

<para>
njs is created in compliance with
<link url="http://www.ecma-international.org/ecma-262/5.1/">ECMAScript 5.1</link>
(strict mode) with some
<link url="http://www.ecma-international.org/ecma-262/6.0/">ECMAScript 6</link>
and later extensions.
The compliance is still evolving.
</para>

<para>
Definitions of njs specific properties and methods
not compliant with ECMAScript can be found in
<link doc="reference.xml">Reference</link>.
Definitions of njs properties and methods
compliant with ECMAScript can be found in
<link url="http://www.ecma-international.org/ecma-262/">ECMAScript
specification</link>.
</para>

<para>

</para>

</section>


<section id="supported" name="What is currently supported">

<para>
<list type="bullet" compact="no">

<listitem>
Boolean values, numbers, strings, objects, arrays,
functions, function constructors
(<link doc="changes.xml" id="njs0.3.6">0.3.6</link>),
and regular expressions
</listitem>

<listitem>
ES5.1 operators, ES7 exponentiation operators
</listitem>

<listitem>
ES5.1 statements:
<literal>break</literal>,
<literal>catch</literal>,
<literal>continue</literal>,
<literal>do while</literal>,
<literal>else</literal>,
<literal>finally</literal>,
<literal>for</literal>,
<literal>for in</literal>,
<literal>if</literal>,
<literal>return</literal>,
<literal>switch</literal>,
<literal>throw</literal>,
<literal>try</literal>,
<literal>var</literal>,
<literal>while</literal>,
labeled statements (<link doc="changes.xml" id="njs0.2.8">0.2.8</link>)
</listitem>

<listitem>
ES6 statements:
<literal>let</literal> (<link doc="changes.xml" id="njs0.6.0">0.6.0</link>),
<literal>const</literal> (<link doc="changes.xml" id="njs0.6.0">0.6.0</link>),
<literal>async</literal> (<link doc="changes.xml" id="njs0.7.0">0.7.0</link>),
<literal>await</literal> (<link doc="changes.xml" id="njs0.7.0">0.7.0</link>)
</listitem>

<listitem>
<literal>Math</literal> properties:
<list type="bullet">

<listitem>
ES6:
<literal>E</literal>,
<literal>LN10</literal>,
<literal>LN2</literal>,
<literal>LOG10E</literal>,
<literal>LOG2E</literal>,
<literal>PI</literal>,
<literal>SQRT1_2</literal>,
<literal>SQRT2</literal>
</listitem>
</list>
</listitem>

<listitem>
<literal>Math</literal> methods:
<list type="bullet">

<listitem>
ES6:
<literal>abs</literal>,
<literal>acos</literal>,
<literal>acosh</literal>,
<literal>asin</literal>,
<literal>asinh</literal>,
<literal>atan</literal>,
<literal>atan2</literal>,
<literal>atanh</literal>,
<literal>cbrt</literal>,
<literal>ceil</literal>,
<literal>clz32</literal>,
<literal>cos</literal>,
<literal>cosh</literal>,
<literal>exp</literal>,
<literal>expm1</literal>,
<literal>floor</literal>,
<literal>fround</literal>,
<literal>hypot</literal>,
<literal>imul</literal>,
<literal>log</literal>,
<literal>log10</literal>,
<literal>log1p</literal>,
<literal>log2</literal>,
<literal>max</literal>,
<literal>min</literal>,
<literal>pow</literal>,
<literal>random</literal>,
<literal>round</literal>,
<literal>sign</literal>,
<literal>sin</literal>,
<literal>sinh</literal>,
<literal>sqrt</literal>,
<literal>tan</literal>,
<literal>tanh</literal>,
<literal>trunc</literal>
</listitem>
</list>
</listitem>

<listitem>
<literal>Number</literal> properties:
<list type="bullet">

<listitem>
ES6:
<literal>EPSILON</literal>,
<literal>MAX_SAFE_INTEGER</literal>,
<literal>MAX_VALUE</literal>,
<literal>MIN_SAFE_INTEGER</literal>,
<literal>MIN_VALUE</literal>,
<literal>NEGATIVE_INFINITY</literal>,
<literal>NaN</literal>,
<literal>POSITIVE_INFINITY</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Number</literal> methods:
<list type="bullet">

<listitem>
ES6:
<literal>isFinite</literal>,
<literal>isInteger</literal>,
<literal>isNaN</literal>,
<literal>isSafeInteger</literal>,
<literal>parseFloat</literal>,
<literal>parseInt</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Number</literal> prototype methods:
<list type="bullet">

<listitem>
ES6:
<literal>toExponential</literal>
(<link doc="changes.xml" id="njs0.3.6">0.3.6</link>),
<literal>toFixed</literal>
(<link doc="changes.xml" id="njs0.3.6">0.3.6</link>),
<literal>toPrecision</literal>
(<link doc="changes.xml" id="njs0.3.6">0.3.6</link>)
</listitem>
</list>

</listitem>

<listitem>
<literal>String</literal> methods:
<list type="bullet">

<listitem>
ES5.1:
<literal>fromCharCode</literal>
</listitem>

<listitem>
ES6:
<literal>fromCodePoint</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>String</literal> prototype methods:
<list type="bullet">

<listitem>
ES5.1:
<literal>charAt</literal>,
<literal>concat</literal>,
<literal>indexOf</literal>,
<literal>lastIndexOf</literal>,
<literal>match</literal>,
<literal>replace</literal>,
<literal>search</literal>,
<literal>slice</literal>,
<literal>split</literal>,
<literal>substr</literal>,
<literal>substring</literal>,
<literal>toLowerCase</literal>,
<literal>trim</literal>,
<literal>toUpperCase</literal>
</listitem>

<listitem>
ES6:
<literal>codePointAt</literal>,
<literal>endsWith</literal>,
<literal>includes</literal>,
<literal>repeat</literal>,
<literal>startsWith</literal>
</listitem>

<listitem>
ES8:
<literal>padEnd</literal>,
<literal>padStart</literal>
</listitem>

<listitem>
ES9:
<literal>trimEnd</literal>
(<link doc="changes.xml" id="njs0.3.4">0.3.4</link>),
<literal>trimStart</literal>
(<link doc="changes.xml" id="njs0.3.4">0.3.4</link>)
</listitem>

<listitem>
ES12:
<literal>replaceAll</literal>
(<link doc="changes.xml" id="njs0.7.10">0.7.10</link>)
</listitem>

<listitem>
non-standard:
<link doc="reference.xml" id="string_bytesfrom"><literal>bytesFrom</literal></link>
(<link doc="changes.xml" id="njs0.2.3">0.2.3</link>),
<link doc="reference.xml" id="string_frombytes"><literal>fromBytes</literal></link>,
<link doc="reference.xml" id="string_fromutf8"><literal>fromUTF8</literal></link>,
<link doc="reference.xml" id="string_tobytes"><literal>toBytes</literal></link>,
<link doc="reference.xml" id="string_toutf8"><literal>toUTF8</literal></link>
</listitem>
</list>

</listitem>

<listitem>
<literal>Object</literal> methods:
<list type="bullet">
<listitem>
ES5.1:
<literal>create</literal> (support without properties list),
<literal>defineProperties</literal> (accessor descriptors support
since <link doc="changes.xml" id="njs0.3.3">0.3.3</link>),
<literal>defineProperty</literal> (accessor descriptors support
since <link doc="changes.xml" id="njs0.3.3">0.3.3</link>),
<literal>freeze</literal>,
<literal>getOwnPropertyDescriptor</literal>,
<literal>getOwnPropertyDescriptors</literal>
(<link doc="changes.xml" id="njs0.3.1">0.3.1</link>),
<literal>getOwnPropertyNames</literal>
(<link doc="changes.xml" id="njs0.3.1">0.3.1</link>),
<literal>getPrototypeOf</literal>,
<literal>isExtensible</literal>,
<literal>isFrozen</literal>,
<literal>isSealed</literal>,
<literal>keys</literal>,
<literal>preventExtensions</literal>,
<literal>seal</literal>
</listitem>

<listitem>
ES6:
<literal>assign</literal>
(<link doc="changes.xml" id="njs0.3.7">0.3.7</link>)
</listitem>

<listitem>
ES8:
<literal>entries</literal>
(<link doc="changes.xml" id="njs0.2.7">0.2.7</link>),
<literal>values</literal>
(<link doc="changes.xml" id="njs0.2.7">0.2.7</link>)
</listitem>
</list>

</listitem>

<listitem>
<literal>Object</literal> prototype methods:
<list type="bullet">
<listitem>
ES5.1:
<literal>hasOwnProperty</literal>,
<literal>isPrototypeOf</literal>,
(<link doc="changes.xml" id="njs0.3.0">0.3.0</link>),
<literal>propertyIsEnumerable</literal>,
<literal>toString</literal>,
<literal>valueOf</literal>
</listitem>

<listitem>
ES6:
<literal>is</literal>
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>),
<literal>setPrototypeOf</literal>
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>)
</listitem>

</list>
</listitem>

<listitem>
<literal>Array</literal> methods:
<list type="bullet">
<listitem>
ES5.1:
<literal>isArray</literal>
</listitem>

<listitem>
ES6:
<literal>of</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Array</literal> prototype methods:
<list type="bullet">
<listitem>
ES5.1:
<literal>concat</literal>,
<literal>every</literal>,
<literal>filter</literal>,
<literal>forEach</literal>,
<literal>indexOf</literal>,
<literal>join</literal>,
<literal>lastIndexOf</literal>,
<literal>map</literal>,
<literal>pop</literal>,
<literal>push</literal>,
<literal>reduce</literal>,
<literal>reduceRight</literal>,
<literal>reverse</literal>,
<literal>shift</literal>,
<literal>slice</literal>,
<literal>some</literal>,
<literal>sort</literal>,
<literal>splice</literal>,
<literal>unshift</literal>
</listitem>

<listitem>
ES6:
<literal>copyWithin</literal>
(<link doc="changes.xml" id="njs0.3.7">0.3.7</link>),
<literal>fill</literal>,
<literal>find</literal>,
<literal>findIndex</literal>
</listitem>

<listitem>
ES7: <literal>includes</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>ArrayBuffer</literal> methods
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>):
<list type="bullet">
<listitem>
ES6:
<literal>isView</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>ArrayBuffer</literal> prototype methods
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>):
<list type="bullet">
<listitem>
ES6:
<literal>slice</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Typed-array</literal> constructors
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>):
<list type="bullet">
<listitem>
ES6:
<literal>Int8Array</literal>,
<literal>Uint8Array</literal>,
<literal>Uint8ClampedArray</literal>,
<literal>Int16Array</literal>,
<literal>Uint16Array</literal>,
<literal>Int32Array</literal>,
<literal>Uint32Array</literal>,
<literal>Float32Array</literal>,
<literal>Float64Array</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Typed-array</literal> prototype methods
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>):
<list type="bullet">
<listitem>
ES6:
<literal>copyWithin</literal>,
<literal>every</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>fill</literal>,
<literal>filter</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>find</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>findIndex</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>forEach</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>includes</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>indexOf</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>join</literal>,
<literal>lastIndexOf</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>map</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>reduce</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>reduceRight</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>reverse</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>set</literal>,
<literal>slice</literal>,
<literal>some</literal>
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>),
<literal>sort</literal>
(<link doc="changes.xml" id="njs0.4.2">0.4.2</link>),
<literal>subarray</literal>,
<literal>toString</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Buffer</literal> methods
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>):
<list type="bullet">
<listitem>
<link doc="reference.xml" id="buffer_alloc"><literal>alloc</literal></link>,
<link doc="reference.xml" id="buffer_alloc_unsafe"><literal>allocUnsafe</literal></link>,
<link doc="reference.xml" id="buffer_bytelength"><literal>byteLength</literal></link>,
<link doc="reference.xml" id="buffer_compare"><literal>compare</literal></link>,
<link doc="reference.xml" id="buffer_concat"><literal>concat</literal></link>,
<link doc="reference.xml" id="buffer_from_array"><literal>from</literal></link>,
<link doc="reference.xml" id="buffer_is_buffer"><literal>isBuffer</literal></link>,
<link doc="reference.xml" id="buffer_is_encoding"><literal>isEncoding</literal></link>
</listitem>
</list>

</listitem>

<listitem>
<literal>Buffer</literal> prototype methods:
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>):
<list type="bullet">
<listitem>
<link doc="reference.xml" id="buf_compare"><literal>compare</literal></link>,
<link doc="reference.xml" id="buf_copy"><literal>copy</literal></link>,
<link doc="reference.xml" id="buf_equals"><literal>equals</literal></link>,
<link doc="reference.xml" id="buf_fill"><literal>fill</literal></link>,
<link doc="reference.xml" id="buf_includes"><literal>includes</literal></link>,
<link doc="reference.xml" id="buf_indexof"><literal>indexOf</literal></link>,
<link doc="reference.xml" id="buf_lastindexof"><literal>lastIndexOf</literal></link>,
<link doc="reference.xml" id="buf_readintbe"><literal>readIntBE</literal></link>,
<literal>readInt8</literal>,
<literal>readInt16BE</literal>,
<literal>readInt32BE</literal>,
<link doc="reference.xml" id="buf_readintle"><literal>readIntLE</literal></link>,
<literal>readInt8</literal>,
<literal>readInt16LE</literal>,
<literal>readInt32LE</literal>,
<link doc="reference.xml" id="buf_readuintbe"><literal>readUIntBE</literal></link>,
<literal>readUInt8</literal>,
<literal>readUInt16BE</literal>,
<literal>readUInt32BE</literal>,
<link doc="reference.xml" id="buf_readuintle"><literal>readUIntLE</literal></link>,
<literal>readUInt8</literal>,
<literal>readUInt16LE</literal>,
<literal>readUInt32LE</literal>,
<link doc="reference.xml" id="buf_readdobulebe"><literal>readDoubleBE</literal></link>,
<link doc="reference.xml" id="buf_readdobulele"><literal>readDoubleLE</literal></link>,
<link doc="reference.xml" id="buf_readfloatbe"><literal>readFloatBE</literal></link>,
<link doc="reference.xml" id="buf_readfloatle"><literal>readFloatLE</literal></link>,
<link doc="reference.xml" id="buf_subarray"><literal>subarray</literal></link>,
<link doc="reference.xml" id="buf_slice"><literal>slice</literal></link>,
<link doc="reference.xml" id="buf_swap16"><literal>swap16</literal></link>,
<link doc="reference.xml" id="buf_swap32"><literal>swap32</literal></link>,
<link doc="reference.xml" id="buf_swap64"><literal>swap64</literal></link>,
<link doc="reference.xml" id="buf_tojson"><literal>toJSON</literal></link>,
<link doc="reference.xml" id="buf_tostring"><literal>toString</literal></link>,
<link doc="reference.xml" id="buf_write"><literal>write</literal></link>,
<link doc="reference.xml" id="buf_writeintbe"><literal>writeIntBE</literal></link>,
<literal>writeInt8</literal>,
<literal>writeInt16BE</literal>,
<literal>writeInt32BE</literal>,
<link doc="reference.xml" id="buf_writeintle"><literal>writeIntLE</literal></link>,
<literal>writeInt8</literal>,
<literal>writeInt16LE</literal>,
<literal>writeInt32LE</literal>,
<link doc="reference.xml" id="buf_writeuintbe"><literal>writeUIntBE</literal></link>,
<literal>writeUInt8</literal>,
<literal>writeUInt16BE</literal>,
<literal>writeUInt32BE</literal>,
<link doc="reference.xml" id="buf_writeuintle"><literal>writeUIntLE</literal></link>,
<literal>writeUInt8</literal>,
<literal>writeUInt16LE</literal>,
<literal>writeUInt32LE</literal>,
<link doc="reference.xml" id="buf_writedoublebe"><literal>writeDoubleBE</literal></link>,
<link doc="reference.xml" id="buf_writedoublele"><literal>writeDoubleLE</literal></link>,
<link doc="reference.xml" id="buf_writefloatbe"><literal>writeFloatBE</literal></link>,
<link doc="reference.xml" id="buf_writefloatle"><literal>writeFloatLE</literal></link>
</listitem>
</list>

</listitem>

<listitem>
<literal>Promise</literal> methods
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>):
<list type="bullet">
<listitem>
ES6:
<literal>any()</literal>
(<link doc="changes.xml" id="njs0.6.2">0.6.2</link>),
<literal> all()</literal>
(<link doc="changes.xml" id="njs0.6.2">0.6.2</link>),
<literal> allSettled()</literal>
(<link doc="changes.xml" id="njs0.6.2">0.6.2</link>),
<literal>reject</literal>,
<literal>resolve</literal>,
<literal>race()</literal> (<link doc="changes.xml" id="njs0.6.2">0.6.2</link>)
</listitem>
</list>

</listitem>

<listitem>
<literal>Promise</literal> prototype methods
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>):
<list type="bullet">
<listitem>
ES6:
<literal>catch</literal>,
<literal>finally</literal>,
<literal>then</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Function</literal> prototype methods:
<list type="bullet">

<listitem>
ES5.1:
<literal>apply</literal>,
<literal>bind</literal>,
<literal>call</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>RegExp</literal> prototype accessor properties:
<list type="bullet">

<listitem>
<literal>flags</literal> (<link doc="changes.xml" id="njs0.6.0">0.6.0</link>),
<literal>global</literal>,
<literal>ignoreCase</literal>,
<literal>multiline</literal>,
<literal>source</literal>,
<literal>sticky</literal> (<link doc="changes.xml" id="njs0.6.0">0.6.0</link>)
</listitem>
</list>

</listitem>

<listitem>
<literal>RegExp</literal> prototype methods:
<list type="bullet">

<listitem>
<literal>[@@replace]</literal>
(<link doc="changes.xml" id="njs0.4.2">0.4.2</link>),
<literal>[@@split]</literal>
(<link doc="changes.xml" id="njs0.6.0">0.6.0</link>)
</listitem>

<listitem>
ES5.1:
<literal>exec</literal>,
<literal>test</literal>,
<literal>toString</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>RegExp</literal> instance properties:
<list type="bullet">

<listitem>
<literal>lastIndex</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>RegExp</literal>
ES9 named capture groups (<link doc="changes.xml" id="njs0.3.2">0.3.2</link>)
</listitem>

<listitem>
<literal>DataView</literal> prototype methods
(<link doc="changes.xml" id="njs0.4.4">0.4.4</link>):
<list type="bullet">

<listitem>
ES6:
<literal>getFloat32</literal>,
<literal>getFloat64</literal>,
<literal>getInt16</literal>,
<literal>getInt32</literal>,
<literal>getInt8</literal>,
<literal>getUint16</literal>,
<literal>getUint32</literal>,
<literal>getUint8</literal>,
<literal>setFloat32</literal>,
<literal>setFloat64</literal>,
<literal>setInt16</literal>,
<literal>setInt32</literal>,
<literal>setInt8</literal>,
<literal>setUint16</literal>,
<literal>setUint32</literal>,
<literal>setUint8</literal>
</listitem>

</list>
</listitem>

<listitem>
<literal>Date</literal> methods:
<list type="bullet">

<listitem>
ES5.1:
<literal>now</literal>,
<literal>parse</literal>,
<literal>UTC</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Date</literal> prototype methods:
<list type="bullet">

<listitem>
ES5.1:
<literal>getDate</literal>,
<literal>getDay</literal>,
<literal>getFullYear</literal>,
<literal>getHours</literal>,
<literal>getMilliseconds</literal>,
<literal>getMinutes</literal>,
<literal>getMonth</literal>,
<literal>getSeconds</literal>,
<literal>getTime</literal>,
<literal>getTimezoneOffset</literal>,
<literal>getUTCDate</literal>,
<literal>getUTCDay</literal>,
<literal>getUTCFullYear</literal>,
<literal>getUTCHours</literal>,
<literal>getUTCMilliseconds</literal>,
<literal>getUTCMinutes</literal>,
<literal>getUTCMonth</literal>,
<literal>getUTCSeconds</literal>,
<literal>toDateString</literal>,
<literal>toISOString</literal>,
<literal>toLocaleDateString</literal>,
<literal>toLocaleString</literal>,
<literal>toLocaleTimeString</literal>,
<literal>toTimeString</literal>,
<literal>toUTCString</literal>,
<literal>setDate</literal>,
<literal>setFullYear</literal>,
<literal>setHours</literal>,
<literal>setMinutes</literal>,
<literal>setMilliseconds</literal>,
<literal>setMonth</literal>,
<literal>setSeconds</literal>,
<literal>setTime</literal>,
<literal>setUTCDate</literal>,
<literal>setUTCFullYear</literal>,
<literal>setUTCHours</literal>,
<literal>setUTCMilliseconds</literal>,
<literal>setUTCMinutes</literal>,
<literal>setUTCMonth</literal>,
<literal>setUTCSeconds</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>JSON</literal> methods:
<list type="bullet">

<listitem>
ES5.1:
<literal>parse</literal>,
<literal>stringify</literal>
</listitem>
</list>

</listitem>

<listitem>
<literal>Symbol</literal> methods
(<link doc="changes.xml" id="njs0.7.6">0.7.6</link>):
<list type="bullet">

<listitem>
<literal>for</literal>,
<literal>keyfor</literal>
</listitem>
</list>

</listitem>

<listitem>
ES5.1 <literal>arguments</literal> object
(<link doc="changes.xml" id="njs0.2.5">0.2.5</link>)
</listitem>

<listitem>
ES6 rest parameters syntax (without destructuring support)
(<link doc="changes.xml" id="njs0.2.7">0.2.7</link>)
</listitem>

<listitem>
ES5.1 global functions:
<literal>decodeURI</literal>,
<literal>decodeURIComponent</literal>,
<literal>encodeURI</literal>,
<literal>encodeURIComponent</literal>,
<literal>isFinite</literal>,
<literal>isNaN</literal>,
<literal>parseFloat</literal>,
<literal>parseInt</literal>
</listitem>

<listitem>
Global functions (<link doc="changes.xml" id="njs0.7.6">0.7.6</link>):
<link doc="reference.xml" id="atob"><literal>atob</literal></link>,
<link doc="reference.xml" id="btoa"><literal>btoa</literal></link>
</listitem>

<listitem>
<literal>Error</literal> objects:
<literal>Error</literal>,
<literal>EvalError</literal>,
<literal>InternalError</literal>,
<literal>RangeError</literal>,
<literal>ReferenceError</literal>,
<literal>SyntaxError</literal>,
<literal>TypeError</literal>,
<literal>URIError</literal>
</listitem>

<listitem>
<link doc="reference.xml" id="cleartimeout"><literal>clearTimeout</literal></link>
and
<link doc="reference.xml" id="settimeout"><literal>setTimeout</literal></link>
functions
(<link doc="changes.xml" id="njs0.2.0">0.2.0</link>)
</listitem>

<listitem>
<literal>File system</literal> methods:
<link doc="reference.xml" id="fs_accesssync"><literal>fs.accessSync</literal></link>
(<link doc="changes.xml" id="njs0.3.9">0.3.9</link>),
<link doc="reference.xml" id="appendfilesync"><literal>fs.appendFileSync</literal></link>,
<link doc="reference.xml" id="fs_mkdirsync"><literal>fs.mkdirSync</literal></link>
(<link doc="changes.xml" id="njs0.4.2">0.4.2</link>),
<link doc="reference.xml" id="fs_readdirsync"><literal>fs.readdirSync</literal></link>
(<link doc="changes.xml" id="njs0.4.2">0.4.2</link>),
<link doc="reference.xml" id="readfilesync"><literal>fs.readFileSync</literal></link>,
<link doc="reference.xml" id="fs_realpathsync"><literal>fs.realpathSync</literal></link>
(<link doc="changes.xml" id="njs0.3.9">0.3.9</link>),
<link doc="reference.xml" id="fs_renamesync"><literal>fs.renameSync</literal></link>
(<link doc="changes.xml" id="njs0.3.4">0.3.4</link>),
<link doc="reference.xml" id="fs_rmdirsync"><literal>fs.rmdirSync</literal></link>
(<link doc="changes.xml" id="njs0.4.2">0.4.2</link>),
<link doc="reference.xml" id="fs_symlinksync"><literal>fs.symlinkSync</literal></link>
(<link doc="changes.xml" id="njs0.3.9">0.3.9</link>),
<link doc="reference.xml" id="fs_unlinksync"><literal>fs.unlinkSync</literal></link>
(<link doc="changes.xml" id="njs0.3.9">0.3.9</link>),
<link doc="reference.xml" id="fs_writefilesync"><literal>fs.writeFileSync</literal></link>
</listitem>

<listitem>
<literal>fs.promises</literal> API (<link doc="changes.xml" id="njs0.3.9">0.3.9</link>),
asynchronous version of file system methods.
</listitem>

<listitem>
<literal>Crypto</literal> methods
(<link doc="changes.xml" id="njs0.2.0">0.2.0</link>):
<link doc="reference.xml" id="crypto_createhash"><literal>crypto.createHash</literal></link>,
<link doc="reference.xml" id="crypto_createhmac"><literal>crypto.createHmac</literal></link>
</listitem>

<listitem id="querysting">
<link doc="reference.xml" id="querystring"><literal>Query String</literal></link>
methods
(<link doc="changes.xml" id="njs0.4.3">0.4.3</link>):
<link doc="reference.xml" id="querystring_decode"><literal>querystring.decode</literal></link>,
<link doc="reference.xml" id="querystring_encode"><literal>querystring.encode</literal></link>,
<link doc="reference.xml" id="querystring_escape"><literal>querystring.escape</literal></link>,
<link doc="reference.xml" id="querystring_parse"><literal>querystring.parse</literal></link>,
<link doc="reference.xml" id="querystring_stringify"><literal>querystring.stringify</literal></link>,
<link doc="reference.xml" id="querystring_unescape"><literal>querystring.unescape</literal></link>
</listitem>

<listitem id="textdecoder">
<link doc="reference.xml" id="textdecoder"><literal>TextDecoder</literal></link>
methods
(<link doc="changes.xml" id="njs0.4.3">0.4.3</link>):
<link doc="reference.xml" id="textdecoder_encoding"><literal>encoding</literal></link>,
<link doc="reference.xml" id="textdecoder_fatal"><literal>fatal</literal></link>,
<link doc="reference.xml" id="textdecoder_ignorebom"><literal>ignoreBOM</literal></link>,
<link doc="reference.xml" id="textdecoder_ignorebom"><literal>decode</literal></link>
</listitem>

<listitem id="textencoder">
<link doc="reference.xml" id="textencoder"><literal>TextEncoder</literal></link>
methods
(<link doc="changes.xml" id="njs0.4.3">0.4.3</link>):
<link doc="reference.xml" id="textencoder_encode"><literal>encode</literal></link>,
<link doc="reference.xml" id="textencoder_encodeinto"><literal>encodeInto</literal></link>
</listitem>

<listitem id="xml">
<link doc="reference.xml" id="xml"><literal>XML</literal></link>
methods
(<link doc="changes.xml" id="njs0.7.10">0.7.10</link>):
<link doc="reference.xml" id="xml_parse"><literal>parse()</literal></link>,
<link doc="reference.xml" id="xml_c14n"><literal>xml.c14n()</literal></link>,
<link doc="reference.xml" id="xml_exclusiveC14n"><literal>xml.exclusiveC14n()</literal></link>,
<link doc="reference.xml" id="xml_doc"><literal>XMLDoc</literal></link>,
<link doc="reference.xml" id="xml_node"><literal>XMLNode</literal></link>,
<link doc="reference.xml" id="xml_xmlattr"><literal>XMLAttr</literal></link>
</listitem>

<listitem>
ES6 modules support:
default <literal>export</literal> and
default <literal>import</literal>
statements
(<link doc="changes.xml" id="njs0.3.0">0.3.0</link>)
</listitem>

<listitem>
ES6 arrow functions
(<link doc="changes.xml" id="njs0.3.1">0.3.1</link>)
</listitem>

<listitem>
Template literals:
multiline strings, expression interpolation, nesting templates
(<link doc="changes.xml" id="njs0.3.2">0.3.2</link>)
</listitem>

<listitem>
Global objects
(<link doc="changes.xml" id="njs0.3.3">0.3.3</link>):
<list type="bullet">

<listitem>
<literal>globalThis</literal> alias
(<link doc="changes.xml" id="njs0.3.8">0.3.8</link>),
</listitem>

<listitem>
<link doc="reference.xml" id="process"><literal>process</literal></link>
</listitem>

</list>
</listitem>


</list>
</para>

</section>

</article>