Editing JScript (section)

{{Short description|Implementation of ECMAScript by Microsoft}}
{{Distinguish|JavaScript}}
{{Infobox programming language
| name                   = JScript
| logo                   = [[File:Jscript icon.gif|32px]]<!--Native resolution-->
| file_ext               = <code>[[.js]]</code>, <code>.jse</code>, <code>[[.wsf]]</code>, <code>.wsc</code> (<code>[[.htm]]</code>, <code>[[.html]]</code>, <code>[[HTML Application|.hta]]</code>, <code>[[Active Server Pages|.asp]]</code>)<ref>{{cite web|url=https://msdn.microsoft.com/en-us/library/67w03h17(v=VS.85).aspx |title=Types of Script Files |date=24 October 2011 |publisher=Msdn.microsoft.com |access-date=2012-08-17}}</ref>
| paradigm               = 
| year                   = {{Start date and age|1996}}
| designer               = 
| developer              = [[Microsoft]]
| latest_release_version = 9.0
| latest_release_date    = March 2011
| typing                 = [[Dynamic typing|Dynamic]], [[weak typing|weak]], [[duck typing|duck]]
| implementations        = [[Active Scripting]], [[JScript .NET]]
| dialects               =
| influenced by          =
| influenced             =
| operating system       = [[Microsoft Windows]]
| license                =
| website                = {{url|1=https://learn.microsoft.com/en-us/previous-versions/hbxc2t98(v=vs.85)}}
}}
'''JScript''' is Microsoft's [[legacy software|legacy]]<ref>{{Cite web|date=2020-10-13|title=Disabling legacy scripting engine JScript in Internet Explorer|url=https://techcommunity.microsoft.com/t5/windows-it-pro-blog/disabling-legacy-scripting-engine-jscript-in-internet-explorer/ba-p/1777563|access-date=2021-11-15|website=TECHCOMMUNITY.MICROSOFT.COM|language=en}}</ref> dialect of the [[ECMAScript]] standard<ref>{{cite web|url=https://msdn.microsoft.com/en-us/library/hbxc2t98(v=vs.85).aspx |title=JScript (ECMAScript3) |date=24 October 2011 |publisher=Msdn.microsoft.com |access-date=2012-08-17}}</ref> that is used in [[Microsoft]]'s [[Internet Explorer]] web browser and [[HTML Application]]s, and as a standalone Windows scripting language.

JScript is implemented as an [[Active Scripting]] engine. This means that it can be "plugged in" to [[OLE Automation]] applications that support Active Scripting, such as [[Internet Explorer]], [[Active Server Pages]], and [[Windows Script Host]].<ref>{{cite web|url=https://msdn.microsoft.com/en-us/library/shzd7dy4(v=VS.85).aspx |title=What Is WSH? |date=24 October 2011 |publisher=Msdn.microsoft.com |access-date=2012-08-17}}</ref> It also means such applications can use multiple Active Scripting languages, e.g., JScript, [[VBScript]] or [[PerlScript]].

JScript was first supported in the [[Internet Explorer#Internet Explorer 3|Internet Explorer 3.0]] browser released in August 1996. Its most recent version is JScript 9.0, included in Internet Explorer 9.

JScript 10.0<ref>[https://msdn.microsoft.com/en-us/library/xkx7dfw1.aspx What is JScript 10.0?]</ref> is a separate dialect, also known as [[JScript .NET]], which adds several new features from the abandoned fourth edition of the ECMAScript standard. It must be compiled for [[.NET Framework]] version 2 or version 4, but static type annotations are optional.

JScript has been criticized for being insecure and having multiple security bugs "exploited by nation-state actors",<ref>{{Cite web|last=Cimpanu|first=Catalin|title=Microsoft adds option to disable JScript in Internet Explorer|url=https://www.zdnet.com/article/microsoft-adds-option-to-disable-jscript-in-internet-explorer/|access-date=2021-11-15|website=ZDNet|language=en}}</ref> leading Microsoft to add an option to disable it.<ref>{{Cite web|title=Option to disable JScript execution in Internet Explorer|url=https://support.microsoft.com/en-us/topic/option-to-disable-jscript-execution-in-internet-explorer-9e3b5ab3-8115-4650-f3d8-e496e7f8e40e|access-date=2021-11-15|website=support.microsoft.com}}</ref>