<!DOCTYPE html>
<html class="client-nojs vector-feature-night-mode-disabled vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-sticky-header-enabled" lang="en" dir="ltr"><head>
<meta charset="UTF-8">
<title>JScript .NET</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="canonical" href="https://en.wikipedia.org/wiki/JScript_.NET"> <link href="./mw/ext.pygments.css" rel="stylesheet" type="text/css">
<link href="./mw/skins.vector.icons.css" rel="stylesheet" type="text/css">
<link href="./mw/skins.vector.search.codex.styles.css" rel="stylesheet" type="text/css">
<link href="./mw/skins.vector.styles.css" rel="stylesheet" type="text/css">
<link href="./mw/user.styles.css" rel="stylesheet" type="text/css">
<meta name="ResourceLoaderDynamicStyles" content="">
<link rel="stylesheet" type="text/css" href="./mw/site.styles.css">
<link rel="stylesheet" type="text/css" href="./mw/noscript.css">
<link rel="stylesheet" type="text/css" href="./footer.css">
<link rel="stylesheet" type="text/css" href="./vector-2022.css">
</head>
<body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject page-JScript_NET rootpage-JScript_NET skin-vector-2022 action-view">
<div class="mw-page-container">
<div class="mw-page-container-inner">
<div class="mw-content-container">
<main id="content" class="mw-body">
<header class="mw-body-header vector-page-titlebar">
<h1 id="firstHeading" class="firstHeading mw-first-heading">
<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">JScript .NET</span></span>
</h1>
</header>
<a id="top"></a>
<div id="bodyContent" class="vector-body ve-init-mw-desktopArticleTarget-targetContainer" aria-labelledby="firstHeading" data-mw-ve-target-container="">
<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr">
<style data-mw-deduplicate="TemplateStyles:r1305433154">
/* start https://en.wikipedia.org/ */
.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}
/* end https://en.wikipedia.org/ */
</style><style data-mw-deduplicate="TemplateStyles:r1248332772">
/* start https://en.wikipedia.org/ */
.mw-parser-output .multiple-issues-text{width:95%;margin:0.2em 0}.mw-parser-output .multiple-issues-text>.mw-collapsible-content{margin-top:0.3em}.mw-parser-output .compact-ambox .ambox{border:none;border-collapse:collapse;background-color:transparent;margin:0 0 0 1.6em!important;padding:0!important;width:auto;display:block}body.mediawiki .mw-parser-output .compact-ambox .ambox.mbox-small-left{font-size:100%;width:auto;margin:0}.mw-parser-output .compact-ambox .ambox .mbox-text{padding:0!important;margin:0!important}.mw-parser-output .compact-ambox .ambox .mbox-text-span{display:list-item;line-height:1.5em;list-style-type:disc}body.skin-minerva .mw-parser-output .multiple-issues-text>.mw-collapsible-toggle,.mw-parser-output .compact-ambox .ambox .mbox-image,.mw-parser-output .compact-ambox .ambox .mbox-imageright,.mw-parser-output .compact-ambox .ambox .mbox-empty-cell,.mw-parser-output .compact-ambox .hide-when-compact{display:none}
/* end https://en.wikipedia.org/ */
</style>
<style data-mw-deduplicate="TemplateStyles:r1295905060">
/* start https://en.wikipedia.org/ */
.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}
/* end https://en.wikipedia.org/ */
</style><table class="infobox vevent"><tbody><tr><th colspan="2" class="infobox-above" style="background-color:#e0e0e0;">JScript .NET</th></tr><tr><th scope="row" class="infobox-label"><a href="Programming_paradigm" title="Programming paradigm">Paradigms</a></th><td class="infobox-data"><a href="Comparison_of_multi-paradigm_programming_languages" title="Comparison of multi-paradigm programming languages">Multi-paradigm</a>: <a href="Object-oriented_programming" title="Object-oriented programming">object-oriented</a> (<a href="Prototype-based_programming" title="Prototype-based programming">prototype-based</a>), <a href="Functional_programming" title="Functional programming">functional</a>, <a href="Imperative_programming" title="Imperative programming">imperative</a>, <a href="Scripting_language" title="Scripting language">scripting</a></td></tr><tr><th scope="row" class="infobox-label">Family</th><td class="infobox-data"><a href="ECMAScript" title="ECMAScript">ECMAScript</a></td></tr><tr><th scope="row" class="infobox-label"><a href="Software_developer" class="mw-redirect" title="Software developer">Developer</a></th><td class="infobox-data organiser"><a href="Microsoft" title="Microsoft">Microsoft Corporation</a></td></tr><tr><th scope="row" class="infobox-label"><a href="Type_system" title="Type system">Typing discipline</a></th><td class="infobox-data"><a href="Duck_typing" title="Duck typing">duck</a>, <a href="Strong_and_weak_typing" title="Strong and weak typing">weak</a>, <a href="Dynamic_typing" class="mw-redirect" title="Dynamic typing">dynamic</a></td></tr><tr><th scope="row" class="infobox-label"><a href="Scope_(computer_science)" title="Scope (computer science)">Scope</a></th><td class="infobox-data"><a href="Scope_(computer_science)" title="Scope (computer science)">lexical</a></td></tr><tr><th scope="row" class="infobox-label"><a href="Computing_platform" title="Computing platform">Platform</a></th><td class="infobox-data"><a href=".NET" title=".NET">.NET</a> framework</td></tr><tr><th scope="row" class="infobox-label"><a href="Operating_system" title="Operating system">OS</a></th><td class="infobox-data"><a href="Microsoft_Windows" title="Microsoft Windows">Microsoft Windows</a></td></tr><tr><th scope="row" class="infobox-label"><a href="Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="Proprietary_software" title="Proprietary software">proprietary</a></td></tr><tr><th scope="row" class="infobox-label"><a href="Filename_extension" title="Filename extension">Filename extensions</a></th><td class="infobox-data">.js</td></tr><tr><th scope="row" class="infobox-label"><a href="File_format" title="File format">File formats</a></th><td class="infobox-data">JScript .NET</td></tr><tr><th colspan="2" class="infobox-header" style="background-color: #EEEEEE;">Influenced by</th></tr><tr><td colspan="2" class="infobox-full-data"><a href="JavaScript" title="JavaScript">JavaScript</a>, <a href="JScript" title="JScript">JScript</a>, <a href="ECMAScript" title="ECMAScript">ECMAScript</a></td></tr></tbody></table>
<p><b>JScript .NET</b> is a <a href=".NET" title=".NET">.NET</a> framework <a href="Programming_language" title="Programming language">programming language</a> developed by <a href="Microsoft" title="Microsoft">Microsoft</a> as <a href="Proprietary_software" title="Proprietary software">proprietary software</a>.
</p><p>The main differences between <a href="JScript" title="JScript">JScript</a> and JScript .NET can be summarized as:
</p><p>Firstly, JScript is a <a href="Scripting_language" title="Scripting language">scripting language</a>, and as such, <a href="Computer_program" title="Computer program">programs</a> (or more suggestively, scripts) can be executed with no need to <a href="Compiler" title="Compiler">compile</a> the code before. This is not the case with the JScript .NET <a href="Command-line_interface" title="Command-line interface">command-line interface</a> compiler, since this next-generation version relies on the .NET <a href="Common_Language_Runtime" title="Common Language Runtime">Common Language Runtime</a> (CLR) for execution, which requires that the code be compiled to <a href="Common_Intermediate_Language" title="Common Intermediate Language">Common Intermediate Language</a> (CIL), formerly named Microsoft Intermediate Language (MSIL), code before it can be run. Nevertheless, JScript .NET still fully supports <a href="Interpreter_(computing)" title="Interpreter (computing)">interpreting</a> <a href="Source_code" title="Source code">source code</a> at <a href="Execution_(computing)#Runtime" title="Execution (computing)">runtime</a> (e.g., via the <code>Function</code> constructor or the <code><a href="Eval#JavaScript" title="Eval">eval</a></code> function) and indeed the interpreter can be exposed by custom applications hosting the JScript .NET engine via the VSA interfaces.
</p><p>Secondly, JScript has a strong foundation in Microsoft's <a href="ActiveX" title="ActiveX">ActiveX</a> and <a href="Component_Object_Model" title="Component Object Model">Component Object Model</a> (COM) technologies, and relies mainly on ActiveX components to provide much of its function (including database access via <a href="ActiveX_Data_Objects" title="ActiveX Data Objects">ActiveX Data Objects</a> (ADO), file handling, etc.), whereas JScript .NET uses the <a href=".NET" title=".NET">.NET</a> framework to provide equivalent function. For backward-compatibility (or for where no .NET equivalent library exists), JScript .NET still provides full access to ActiveX objects via .NET and <a href="COM_Interop" title="COM Interop">COM Interop</a> using both the ActiveXObject constructor and the standard methods of the .NET <code>Type</code> class.
</p><p>Although the .NET framework and languages such as <a href="C_Sharp_(programming_language)" title="C Sharp (programming language)">C#</a> and <a href="Visual_Basic_(.NET)" title="Visual Basic (.NET)">Visual Basic (.NET)</a> have been adopted widely, JScript .NET has received little attention, from the media and developers. It is not supported in Microsoft's premier development tool, <a href="Visual_Studio_.NET" class="mw-redirect" title="Visual Studio .NET">Visual Studio .NET</a>. However, <a href="ASP.NET" title="ASP.NET">ASP.NET</a> supports JScript .NET.
</p>
<meta property="mw:PageProp/toc">
<div class="mw-heading mw-heading2"><h2 id="Language_differences">Language differences</h2></div>
<p>The following are prime examples of language differences between JScript .NET and other .NET languages, including comparisons.
</p>
<div class="mw-heading mw-heading3"><h3 id="Differences_with_C#">Differences with C#</h3></div>
<ul><li>JScript .NET does not require an <a href="Entry_point" title="Entry point">entry point</a> (<style data-mw-deduplicate="TemplateStyles:r886049734">
/* start https://en.wikipedia.org/ */
.mw-parser-output .monospaced{font-family:monospace,monospace}
/* end https://en.wikipedia.org/ */
</style><span class="monospaced">main()</span> <a href="Function_(computer_programming)" title="Function (computer programming)">function</a>) that an <a href="Operating_system" title="Operating system">operating system</a> must call directly when executing a JScript .NET application, as such, JScript .NET program <a href="Control_flow" title="Control flow">control flow</a> can be based on global code.</li>
<li>JScript .NET, because of its very loose <a href="Data_type" title="Data type">data type</a> checking system, can be easier to learn, since the common convention of <a href="Declaration_(computer_programming)" title="Declaration (computer programming)">declaring</a> types explicitly is unneeded.</li>
<li>JScript .NET does not require explicit references to the .NET framework Base Class Library, as certain functions found in earlier versions of JScript are present in JScript .NET (e.g., functions for finding the <a href="Trigonometric_function" class="mw-redirect" title="Trigonometric function">tangent</a> of an angle for a <a href="Right_triangle" title="Right triangle">right triangle</a>).</li>
<li>JScript .NET is closely linked to <a href="C_syntax" title="C syntax">C syntax</a>, and is thus easy to learn for <a href="C_Sharp_(programming_language)" title="C Sharp (programming language)">C#</a>, <a href="Java_(programming_language)" title="Java (programming language)">Java</a>, or <a href="C%2B%2B" title="C++">C++</a> developers.</li>
<li>While JScript .NET can be used to create Windows Forms applications, it can have some trouble, as delegates can only be consumed in JScript .NET and not created. Thus, custom events are hard to emulate in JScript .NET.</li></ul>
<div class="mw-heading mw-heading3"><h3 id="Differences_with_C++">Differences with C++</h3></div>
<ul><li>JScript .NET does not need a <span class="monospaced"><a href="Entry_point" title="Entry point">main()</a></span> <a href="Function_(computer_programming)" title="Function (computer programming)">function</a>.</li>
<li>JScript .NET does not need explicit <a href="Type_declaration" class="mw-redirect" title="Type declaration">type declaration</a> on variables. (In <a href="C%2B%2B" title="C++">C++</a>, the use of templates and generics can be compared to this, loosely emulated with template specialization, etc.)</li>
<li>JScript .NET does not need explicit <a href="Type_conversion" title="Type conversion">type casts</a> on variable use in the program. Code used to retrieve a string of characters, but only used for integer numbers can be cast implicitly; the vice versa can be done without error at <a href="Compile_time" title="Compile time">compile time</a>, but there is a chance of loss of precision or data.</li></ul>
<p>e.g.:
</p>
<div class="mw-highlight mw-highlight-lang-javascript mw-content-ltr" dir="ltr"><pre><span class="k">import</span><span class="w"> </span><span class="nx">System</span><span class="p">;</span>
<span class="nx">Console</span><span class="p">.</span><span class="nx">WriteLine</span><span class="p">(</span><span class="s2">"Hello, what's your name?"</span><span class="p">);</span>
<span class="nx">Console</span><span class="p">.</span><span class="nx">WriteLine</span><span class="p">(</span><span class="s2">"Type your name: "</span><span class="p">);</span>
<span class="kd">var</span><span class="w"> </span><span class="nx">_name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nx">Console</span><span class="p">.</span><span class="nx">ReadLine</span><span class="p">();</span>
<span class="nx">Console</span><span class="p">.</span><span class="nx">WriteLine</span><span class="p">(</span><span class="s2">"Hello, "</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="nx">_name</span><span class="p">);</span>
</pre></div>
<div class="mw-heading mw-heading3"><h3 id="Differences_with_Java">Differences with Java</h3></div>
<ul><li>JScript .NET syntax and lexical conventions are similar to <a href="Java_(programming_language)" title="Java (programming language)">Java</a> in that both are derived from <a href="C_(programming_language)" title="C (programming language)">C</a>. JScript was originally Microsoft's implementation of <a href="ECMAScript" title="ECMAScript">ECMAScript</a>, which is more commonly known as <a href="JavaScript" title="JavaScript">JavaScript</a>, though it is unrelated to Java. Thus, users of Java and other C-derived languages will find JScript easier to learn.</li>
<li>JScript .NET allows developers to use <a href="Variable_(computer_science)#Typing" title="Variable (computer science)">untyped variables</a>, and can sometimes infer their type from their usage to optimize the compiled code. On the other hand, Java requires all variables to be typed.</li>
<li>JScript .NET can add properties and methods to objects in <a href="Run_time_(program_lifecycle_phase)" class="mw-redirect" title="Run time (program lifecycle phase)">run-time</a>, while Java objects always conform to their declared interface.</li>
<li>JScript .NET supports <a href="Global_variables" class="mw-redirect" title="Global variables">global variables</a>, something Java does not.</li></ul>
<div class="mw-heading mw-heading3"><h3 id="Differences_with_older_versions_of_JScript">Differences with older versions of JScript</h3></div>
<ul><li>JScript .NET allows declarimg variables and functions with type information (e.g., <code>var x : String;</code>), while type information for JScript's variables and functions cannot be declared (e.g., <code>var x;</code>).</li>
<li>JScript .NET scripts are not interpreted, but executed independently. When executed, a JScript .NET application will invoke the <a href="Common_Language_Runtime" title="Common Language Runtime">CLR</a>. The CLR will execute the <a href="Common_Intermediate_Language" title="Common Intermediate Language">CIL</a> instructions without using an interpreter.</li>
<li>JScript .NET can be run without the presence of a browser or another <a href="Scripting_language" title="Scripting language">scripting engine</a> as the compiler can generate standalone <a href="Executable" title="Executable">executables</a> and assemblies. However these still require <a href=".NET" title=".NET">.NET</a> framework to be installed to run.</li>
<li>JScript .NET provides access to the .NET framework <a href="Base_Class_Library" class="mw-redirect" title="Base Class Library">Base Class Library</a> (BCL), providing much more function.</li>
<li>JScript .NET is available as a scripting language for only <a href="ASP.NET" title="ASP.NET">ASP.NET</a>, the technology used to generate web pages. Thus, JScript .NET has a role similar to <a href="PHP" title="PHP">PHP</a> and other <a href="Client%E2%80%93server_model" title="Client–server model">server-side</a> scripting languages. Internet Explorer, however, still uses only the older JScript engine, so JScript.NET cannot be used to script web pages (or <a href="HTML_Application" title="HTML Application">HTML Applications</a> (HTAs), or HTCs). In this regard, JScript is much more versatile than JScript .NET.</li></ul>
<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="JavaScript_OSA" title="JavaScript OSA">JavaScript OSA</a> – system-level scripting language for <a href="Apple_Inc." title="Apple Inc.">Apple</a> <a href="Mac_(computer)" title="Mac (computer)">Macintosh</a></li>
<li><a href="JScript" title="JScript">JScript</a></li>
<li><a href="ActionScript" title="ActionScript">ActionScript</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2></div>
<style data-mw-deduplicate="TemplateStyles:r1239543626">
/* start https://en.wikipedia.org/ */
.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}
/* end https://en.wikipedia.org/ */
</style><div class="reflist">
</div>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
<ul><li><a rel="nofollow" class="external text" href="http://msdn.microsoft.com/en-us/library/3bf5fs13.aspx">Getting Started With JScript .NET</a></li>
<li><a rel="nofollow" class="external text" href="http://msdn.microsoft.com/en-us/library/ms974588.aspx">Introducing JScript .NET</a></li>
<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20091027083329/http://geocities.com/Jeff_Louie/jscript_net_windows_form.htm">JScript.NET tutorial and form tutorial</a></li></ul>
<div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">
/* start https://en.wikipedia.org/ */
.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}
/* end https://en.wikipedia.org/ */
</style><style data-mw-deduplicate="TemplateStyles:r1236075235">
/* start https://en.wikipedia.org/ */
.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}
/* end https://en.wikipedia.org/ */
</style></div><div role="navigation" class="navbox" aria-labelledby="Common_Language_Infrastructure106" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><style data-mw-deduplicate="TemplateStyles:r1239400231">
/* start https://en.wikipedia.org/ */
.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}
/* end https://en.wikipedia.org/ */
</style><div id="Common_Language_Infrastructure106" style="font-size:114%;margin:0 4em"><a href="Common_Language_Infrastructure" title="Common Language Infrastructure">Common Language Infrastructure</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Architecture</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Application_domain" title="Application domain">Application domain</a></li>
<li><a href="Code_Access_Security" title="Code Access Security">Code Access Security</a></li>
<li><a href="Common_Intermediate_Language" title="Common Intermediate Language">Common Intermediate Language</a>
<ul><li><a href="List_of_CIL_instructions" title="List of CIL instructions">instructions</a></li></ul></li>
<li><a href="Common_Type_System" title="Common Type System">Common Type System</a></li>
<li><a href="Platform_Invocation_Services" title="Platform Invocation Services">Platform Invocation Services</a></li>
<li><a href="Virtual_Execution_System" title="Virtual Execution System">Virtual Execution System</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Components</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Assembly_(CLI)" title="Assembly (CLI)">Assembly</a></li>
<li><a href="Delegate_(CLI)" title="Delegate (CLI)">Delegate</a></li>
<li><a href="Global_Assembly_Cache" title="Global Assembly Cache">Global Assembly Cache</a></li>
<li><a href="Manifest_(CLI)" title="Manifest (CLI)">Manifest</a></li>
<li><a href="Metadata_(CLI)" title="Metadata (CLI)">Metadata</a></li>
<li><a href="Standard_Libraries_(CLI)" title="Standard Libraries (CLI)">Standard Libraries</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Implementations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Microsoft</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href=".NET" title=".NET">.NET</a></li>
<li><a href=".NET_Framework" title=".NET Framework">.NET Framework</a></li>
<li><a href=".NET_Compact_Framework" title=".NET Compact Framework">.NET Compact Framework</a></li>
<li><a href=".NET_Micro_Framework" title=".NET Micro Framework">.NET Micro Framework</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Mono_(software)" title="Mono (software)">Mono</a></li>
<li><a href="DotGNU" title="DotGNU">DotGNU</a></li></ul>
</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="List_of_CLI_languages" title="List of CLI languages">Languages</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Major</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="C_Sharp_(programming_language)" title="C Sharp (programming language)">C#</a></li>
<li><a href="Visual_Basic_(.NET)" title="Visual Basic (.NET)">Visual Basic</a></li>
<li><a href="F_Sharp_(programming_language)" title="F Sharp (programming language)">F#</a></li>
<li><a href="PowerShell" title="PowerShell">PowerShell</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Axum_(programming_language)" title="Axum (programming language)">Axum</a></li>
<li><a href="A_Sharp_(.NET)" title="A Sharp (.NET)">A#</a></li>
<li><a href="Boo_(programming_language)" title="Boo (programming language)">Boo</a></li>
<li><a href="Clojure" title="Clojure">Clojure</a></li>
<li><a href="Cobra_(programming_language)" title="Cobra (programming language)">Cobra</a></li>
<li><a href="C%2B%2B/CLI" title="C++/CLI">C++/CLI</a></li>
<li><a href="IronScheme" title="IronScheme">IronScheme</a></li>
<li><a href="IronPython" title="IronPython">IronPython</a></li>
<li><a href="IronRuby" title="IronRuby">IronRuby</a></li>
<li><a href="Visual_J_Sharp" title="Visual J Sharp">J#</a></li>
<li><a href="Nemerle" title="Nemerle">Nemerle</a></li>
<li><a href="Oxygene_(programming_language)" title="Oxygene (programming language)">Oxygene</a></li>
<li><a href="Phalanger_(compiler)" title="Phalanger (compiler)">Phalanger</a></li>
<li><a href="Q_Sharp" title="Q Sharp">Q#</a></li>
<li><a href="Scala_(programming_language)" title="Scala (programming language)">Scala</a></li>
<li><a href="Microsoft_Small_Basic" title="Microsoft Small Basic">Small Basic</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Comparison</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Comparison_of_C_Sharp_and_Java" title="Comparison of C Sharp and Java">C# and Java</a></li>
<li><a href="Comparison_of_C_Sharp_and_Visual_Basic_.NET" title="Comparison of C Sharp and Visual Basic .NET">C# and Visual Basic .NET</a></li>
<li><a href="Comparison_of_Visual_Basic_and_Visual_Basic_.NET" title="Comparison of Visual Basic and Visual Basic .NET">Visual Basic and Visual Basic .NET</a></li></ul>
</div></td></tr></tbody></table><div></div></td></tr></tbody></table></div>
<div class="navbox-styles"></div><div role="navigation" class="navbox" aria-labelledby="ECMAScript584" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="ECMAScript584" style="font-size:114%;margin:0 4em"><a href="ECMAScript" title="ECMAScript">ECMAScript</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Dialects</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="ActionScript" title="ActionScript">ActionScript</a>
<ul><li><a href="Haxe" title="Haxe">Haxe</a></li></ul></li>
<li><a href="Caja_project" title="Caja project">Caja</a></li>
<li><a href="JavaScript" title="JavaScript">JavaScript</a>
<ul><li><a href="JavaScript_engine" class="mw-redirect" title="JavaScript engine">engines</a></li>
<li><a href="Asm.js" title="Asm.js">asm.js</a></li></ul></li>
<li><a href="JScript" title="JScript">JScript</a></li>
<li><a href="QtScript" title="QtScript">QtScript</a></li>
<li><a href="TypeScript" title="TypeScript">TypeScript</a></li>
<li><a href="WMLScript" title="WMLScript">WMLScript</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="List_of_JavaScript_engines" title="List of JavaScript engines">Engines</a><br>(list)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Presto_(browser_engine)#ECMAScript_engines" title="Presto (browser engine)">Carakan</a></li>
<li><a href="Presto_(browser_engine)#ECMAScript_engines" title="Presto (browser engine)">Futhark</a></li>
<li>InScript</li>
<li><a href="WebKit#JavaScriptCore" title="WebKit">JavaScriptCore</a></li>
<li><a href="JScript" title="JScript">JScript</a></li>
<li><a href="KJS_(software)" class="mw-redirect" title="KJS (software)">KJS</a></li>
<li><a href="Presto_(browser_engine)#ECMAScript_engines" title="Presto (browser engine)">Linear B</a></li>
<li><a href="QtScript" title="QtScript">QtScript</a></li>
<li><a href="Rhino_(JavaScript_engine)" title="Rhino (JavaScript engine)">Rhino</a></li>
<li><a href="SpiderMonkey" title="SpiderMonkey">SpiderMonkey</a>
<ul><li><a href="SpiderMonkey#TraceMonkey" title="SpiderMonkey">TraceMonkey</a></li>
<li><a href="SpiderMonkey#JägerMonkey" title="SpiderMonkey">JägerMonkey</a></li></ul></li>
<li><a href="Tamarin_(software)" title="Tamarin (software)">Tamarin</a></li>
<li><a href="V8_(JavaScript_engine)" title="V8 (JavaScript engine)">V8</a></li>
<li><a href="Chakra_(JavaScript_engine)" title="Chakra (JavaScript engine)">ChakraCore</a>
<ul><li><a href="Chakra_(JScript_engine)" title="Chakra (JScript engine)">Chakra</a></li></ul></li>
<li><a href="Nashorn_(JavaScript_engine)" title="Nashorn (JavaScript engine)">Nashorn</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Software_framework" title="Software framework">Frameworks</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Client-side_JavaScript" class="mw-redirect" title="Client-side JavaScript">Client-side</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Dojo_Toolkit" title="Dojo Toolkit">Dojo</a></li>
<li><a href="Echo_(framework)" title="Echo (framework)">Echo</a></li>
<li><a href="Ext_JS" title="Ext JS">Ext JS</a></li>
<li><a href="Google_Web_Toolkit" title="Google Web Toolkit">Google Web Toolkit</a></li>
<li><a href="JQuery" title="JQuery">jQuery</a></li>
<li><a href="Lively_Kernel" title="Lively Kernel">Lively Kernel</a></li>
<li>midori</li>
<li><a href="MochiKit" title="MochiKit">MochiKit</a></li>
<li><a href="MooTools" title="MooTools">MooTools</a></li>
<li><a href="Prototype_JavaScript_Framework" title="Prototype JavaScript Framework">Prototype</a></li>
<li><a href="Pyjs" title="Pyjs">Pyjs</a></li>
<li><a href="Qooxdoo" title="Qooxdoo">qooxdoo</a></li>
<li><a href="SproutCore" title="SproutCore">SproutCore</a></li>
<li><a href="Spry_framework" title="Spry framework">Spry</a></li>
<li>Wakanda Framework</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Server-side_JavaScript" class="mw-redirect" title="Server-side JavaScript">Server-side</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Node.js" title="Node.js">Node.js</a></li>
<li><a href="Deno_(software)" title="Deno (software)">Deno</a></li>
<li><a href="Bun_(software)" title="Bun (software)">Bun</a></li>
<li><a href="Jaxer" class="mw-redirect" title="Jaxer">Jaxer</a></li>
<li><a href="AppJet" title="AppJet">AppJet</a></li>
<li>WakandaDB</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Multiple</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li>Cappuccino</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="JavaScript_library" title="JavaScript library">Libraries</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Backbone.js" title="Backbone.js">Backbone.js</a></li>
<li><a href="SWFObject" title="SWFObject">SWFObject</a></li>
<li><a href="Underscore.js" title="Underscore.js">Underscore.js</a></li></ul>
</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">People</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Brendan_Eich" title="Brendan Eich">Brendan Eich</a></li>
<li><a href="Douglas_Crockford" title="Douglas Crockford">Douglas Crockford</a></li>
<li><a href="John_Resig" title="John Resig">John Resig</a></li>
<li>Scott Isaacs</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Dynamic_HTML" title="Dynamic HTML">DHTML</a></li>
<li><a href="Ecma_International" title="Ecma International">Ecma International</a></li>
<li><a href="JSDoc" title="JSDoc">JSDoc</a></li>
<li><a href="JSGI" title="JSGI">JSGI</a></li>
<li><a href="JSHint" title="JSHint">JSHint</a></li>
<li><a href="JSLint" title="JSLint">JSLint</a></li>
<li><a href="JSON" title="JSON">JSON</a></li>
<li><a href="JavaScript_Style_Sheets" title="JavaScript Style Sheets">JSSS</a></li>
<li><a href="Sputnik_(JavaScript_conformance_test)" title="Sputnik (JavaScript conformance test)">Sputnik</a></li>
<li><a href="Browser_speed_test" class="mw-redirect" title="Browser speed test">SunSpider</a></li>
<li><a href="Asynchronous_module_definition" title="Asynchronous module definition">Asynchronous module definition</a></li>
<li><a href="CommonJS" title="CommonJS">CommonJS</a></li></ul>
</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><span class="noviewer" typeof="mw:File"><span title="List-Class article"></span></span> <b>Lists</b>: <a href="List_of_JavaScript_libraries" title="List of JavaScript libraries">JavaScript libraries</a> • <a href="List_of_Ajax_frameworks#JavaScript" title="List of Ajax frameworks">Ajax frameworks</a> • <a href="List_of_server-side_JavaScript_implementations" title="List of server-side JavaScript implementations">Server-side JavaScript</a><br><span class="noviewer" typeof="mw:File"><span title="List-Class article"></span></span> <b>Comparison</b>: <a href="Comparison_of_JavaScript-based_web_frameworks" title="Comparison of JavaScript-based web frameworks">JavaScript web frameworks</a></div></td></tr></tbody></table></div></div><!--htdig_noindex--><div><div class="zim-footer">
This article is issued from <a class="external text" title="Last edited on 2025-06-25" href="https://en.wikipedia.org/wiki/?title=JScript_.NET&oldid=1297311349">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.
</div>
</div><!--/htdig_noindex--></div>
</div>
</main>
</div>
</div>
</div>
</body></html>