Embedding JavaScript engine into NET

Question

just wondering if anyone has ever tried embedding and actually integrating any js engine into the  net environment  I could find and actually use  after a LOT of pain and effort  since it s pretty outdated and not quite finished  spidermonkey-dotnet project  Anyone with experience in this area  Engines like SquirrelFish  V8     Not that I m not satisfied with Mozilla s Spidermonkey  using it for Rails-like miniframework for custom components inside the core ASP NET application   but I d still love to explore a bit further with the options  The command-line solutions are not what I d need  I cannot rely on anything else than CLR  I need to call methods from to JavaScript C  objects      c  class public class A       public string Hello string msg                return msg     whatewer               js snippet var a   new A    console log a Hello  Call me        i have a console log implemented  don t worry  it s not a client-side code      Just to clarify - I m not trying to actually program the application itself in server-side javascript  It s used solely for writing custom user subapplications  can be seen as some sort of DSL   It s much easier  and safer  to allow normal people programming in js than C

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If the language isn t a problem  any sandboxed scripted one  then there s LUA for  NET  The Silverlight version of the  NET framework is also sandboxed afaik

User · Answer

I just tried RemObjects Script for  Net   It works  although I had to use a static factory  var a A createA     from JavaScript instead of the var a new A   syntax   ExposeType function only exposes statics   Not much documentation and the source is written with Delphi Prism  which is rather unusual for me and the RedGate Reflector   So  Easy to use and setup  but not much help for advanced scenarios   Also having to install something instead of just dropping the assemblies in a directory is a negative for me

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V8 NET is a new kid on the block  as of April 2013  that more closely wraps the native V8 engine functionality   It allows for more control over the implementation

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V8 NET is a new kid on the block  as of April 2013  that more closely wraps the native V8 engine functionality   It allows for more control over the implementation

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I guess I am still unclear about what it is you are trying to do  but JScript NET might be worth looking into  though Managed JScript seems like it may be more appropriate for your needs  it is more like JavaScript than JScript NET    Personally  I thought it would be cool to integrate V8 somehow  but I didn t get past downloading the source code  wish I had the time to actually do something with it

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There is an implementation of an ActiveX Scripting Engine Host in C  available here  parse and execute JS by C   It allows to use Javascript  or VBScript  directly from C   in native 32-bit or 64-bit processes  The full source is  500 lines of C  code  It only has an implicit dependency on the installed JScript  or VBScript  engine DLL   For example  the following code   Console WriteLine ScriptEngine Eval  jscript    1 2 3       will display 1 66666666666667

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I guess I am still unclear about what it is you are trying to do  but JScript NET might be worth looking into  though Managed JScript seems like it may be more appropriate for your needs  it is more like JavaScript than JScript NET    Personally  I thought it would be cool to integrate V8 somehow  but I didn t get past downloading the source code  wish I had the time to actually do something with it

User · Answer

I know I m opening up an old thread but I ve done a lot of work on smnet  spidermonkey-dotnet   In the recent years  It s main development focus has been seamless embedding of  net objects into the spidermonkey engine  It supports a wide variety of conversions from js values to  net objects  Some of those including delegates and events   Just saying it might be worth checking into now that there s some steady development on it     I do keep the SVN repo up to date with bug fixes and new features  The source and project solution files are configured to successfully build on download  If there are any problems using it  feel free to open a discussion   I do understand the desire to have a managed javascript solution  but of all the managed javascript s I ve used they re all very lacking in some key features that help make them both robust and easy to work with  I myself am waiting on IronJS to mature a little  While I wait  I have fun playing with spidermonkey-dotnet      spidermonkey-dotnet project and download page  Edit  created documentation wiki page this afternoon

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Try ReoScript  an open-source JavaScript interpreter implemented in C    ReoScript makes your application can execute JavaScript  It has a wide variety of extension methons such as SetVariable  Function Extension  using CLR Type   Net Event Binding and etc    Hello World   ScriptRunningMachine srm   new ScriptRunningMachine    srm Run   alert  hello world           And here is an example of script that creates a winform and show it   import System Windows Forms              import namespace  var f   new Form                         create form f click   function     f close           close when user clicked on form  f show                                   show

User · Answer

I guess I am still unclear about what it is you are trying to do  but JScript NET might be worth looking into  though Managed JScript seems like it may be more appropriate for your needs  it is more like JavaScript than JScript NET    Personally  I thought it would be cool to integrate V8 somehow  but I didn t get past downloading the source code  wish I had the time to actually do something with it

User · Answer

It s Possible now with ASP Net MVC4 Razor View engine  the code will be this      c  class public class A       public string Hello string msg                return msg     whatewer               js snippet  lt script type  text javascript  gt  var a   new A    console log   a Hello  Call me         i have a console log implemented  don t worry  it s not a client-side code     lt  script gt    and Razor isn t just for MVC4 or another web applications and you can use it in offline desktop applications

User · Answer

You can use the Chakra engine in C   Here is an article on msdn showing how   http   code msdn microsoft com windowsdesktop JavaScript-Runtime-Hosting-d3a13880

User · Answer

There is an implementation of an ActiveX Scripting Engine Host in C  available here  parse and execute JS by C   It allows to use Javascript  or VBScript  directly from C   in native 32-bit or 64-bit processes  The full source is  500 lines of C  code  It only has an implicit dependency on the installed JScript  or VBScript  engine DLL   For example  the following code   Console WriteLine ScriptEngine Eval  jscript    1 2 3       will display 1 66666666666667

User · Answer

i believe all the major opensource JS engines  JavaScriptCore  SpiderMonkey  V8  and KJS  provide embedding APIs   The only one I am actually directly familiar with is JavaScriptCore   which is name of the JS engine the SquirrelFish lives in  which provides a pure C API   If memory serves  it s been a while since i used  NET   NET has fairly good support for linking in C API s   I m honestly not sure what the API s for the other engines are like  but I do know that they all provide them   That said  depending on your purposes JScript NET may be best  as all of these other engines will require you to include them with your app  as JSC is the only one that actually ships with an OS  but that OS is MacOS  D

User · Answer

The open source JavaScript interpreter Jint  http   jint codeplex com  does exactly what you are looking for   Edit   The project has been entirely rewritten and is now hosted on Github at https   github com sebastienros jint

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You can try ironJS  looks promising although it is in heavy development  https   github com fholm IronJS

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You can use Rhino a Mozilla Javascript engine written on Java  and use it with IKVM   here are some instructions  Instructions https   www codeproject com Articles 41792 Embedding-JavaScript-into-C-with-Rhino-and-IKVM

User · Answer

Use JSCRIPT NET to get a library dll  of the js   Then reference this dll in your  NET application and you are just there  DONE

User · Answer

There is also MsieJavaScriptEngine which uses Internet Explorers Chakra engine

User · Answer

It s Possible now with ASP Net MVC4 Razor View engine  the code will be this      c  class public class A       public string Hello string msg                return msg     whatewer               js snippet  lt script type  text javascript  gt  var a   new A    console log   a Hello  Call me         i have a console log implemented  don t worry  it s not a client-side code     lt  script gt    and Razor isn t just for MVC4 or another web applications and you can use it in offline desktop applications

User · Answer

Try Javascript  NET  It is hosted on GitHub It was originally hosted on CodePlex  here   Project discussions  http   javascriptdotnet codeplex com discussions  It implements Google V8  You can compile and run JavaScript directly from  NET code with it  and supply CLI objects to be used by the JavaScript code as well  It generates native code from JavaScript

User · Answer

You can use Rhino a Mozilla Javascript engine written on Java  and use it with IKVM   here are some instructions  Instructions https   www codeproject com Articles 41792 Embedding-JavaScript-into-C-with-Rhino-and-IKVM

User · Answer

i believe all the major opensource JS engines  JavaScriptCore  SpiderMonkey  V8  and KJS  provide embedding APIs   The only one I am actually directly familiar with is JavaScriptCore   which is name of the JS engine the SquirrelFish lives in  which provides a pure C API   If memory serves  it s been a while since i used  NET   NET has fairly good support for linking in C API s   I m honestly not sure what the API s for the other engines are like  but I do know that they all provide them   That said  depending on your purposes JScript NET may be best  as all of these other engines will require you to include them with your app  as JSC is the only one that actually ships with an OS  but that OS is MacOS  D

User · Answer

Microsoft s documented way to add script extensibility to anything is IActiveScript   You can use IActiveScript from within anyt  NET app  to call script logic   The logic can party on  NET objects that you ve placed into the scripting context    This answer provides an application that does it  with code     Will the IE10 Chakra JScript engine available as stand alone accessible from C

User · Answer

Hey take a look for Javascript  NET on codeplex  http   javascriptdotnet codeplex com   with the version 0 3 1 there is some pretty sweet new features that will probly interest you   Check out a sample code      Initialize the context JavascriptContext context   new JavascriptContext        Setting the externals parameters of the context context SetParameter  console   new SystemConsole     context SetParameter  message    Hello World      context SetParameter  number   1       Running the script context Run  var i  for  i   0  i  lt  5  i    console Print message          i         number    i         Getting a parameter Console WriteLine  number      context GetParameter  number

User · Answer

I came up with a much simpler solution instead   I built a  dll file using Javascript and then compiled it using the Javascript compiler which is available in a VS2013 developer command prompt   Once we have the  dll we simply add it to the  Support folder and then referenced it in the project which needed to eval Javascript statements   Detailed Steps to create a  dll    Create a file in Notepad with only these contents   class EvalClass   function Evaluate expression  String    return eval expression         Save the file as C  MyEval js Open a VS2005 Command Prompt  Start  Programs  VS2005  VS2005 Tools  Type Cd  to get to C   Type   jsc  t library C  MyEval js  A new file is created named MyEval dll  Copy MyEval dll to the project and reference it  also reference Microsoft Jscript dll   Then you should be able to call it like this   Dim jScriptEvaluator As New EvalClass Dim objResult As Object objResult   jScriptEvaluator Evaluate    1  1  amp  amp  2  2        objResult is True

User · Answer

Anybody just tuning in check out Jurassic as well    http   jurassic codeplex com   edit  this has moved to github  and seems active at first glance   https   github com paulbartrum jurassic

User · Answer

Try Javascript  NET  It is hosted on GitHub It was originally hosted on CodePlex  here   Project discussions  http   javascriptdotnet codeplex com discussions  It implements Google V8  You can compile and run JavaScript directly from  NET code with it  and supply CLI objects to be used by the JavaScript code as well  It generates native code from JavaScript

User · Answer

You can use the Chakra engine in C   Here is an article on msdn showing how   http   code msdn microsoft com windowsdesktop JavaScript-Runtime-Hosting-d3a13880

User · Answer

You might also be interested in Microsoft ClearScript which is hosted on GitHub and published under the Ms-Pl licence   I am no Microsoft fanboy  but I must admit that the V8 support has about the same functionnalities as Javascript Net  and more important  the project is still maintained  As far as I am concerned  the support for delegates also functions better than with Spidermonkey-dotnet   ps  It also support JScript and VBScript but we were not interested by this old stuff   ps  It is compatible with  NET 4 0 and 4 5

User · Answer

If the language isn t a problem  any sandboxed scripted one  then there s LUA for  NET  The Silverlight version of the  NET framework is also sandboxed afaik

User · Answer

I guess I am still unclear about what it is you are trying to do  but JScript NET might be worth looking into  though Managed JScript seems like it may be more appropriate for your needs  it is more like JavaScript than JScript NET    Personally  I thought it would be cool to integrate V8 somehow  but I didn t get past downloading the source code  wish I had the time to actually do something with it

User · Answer

I came up with a much simpler solution instead   I built a  dll file using Javascript and then compiled it using the Javascript compiler which is available in a VS2013 developer command prompt   Once we have the  dll we simply add it to the  Support folder and then referenced it in the project which needed to eval Javascript statements   Detailed Steps to create a  dll    Create a file in Notepad with only these contents   class EvalClass   function Evaluate expression  String    return eval expression         Save the file as C  MyEval js Open a VS2005 Command Prompt  Start  Programs  VS2005  VS2005 Tools  Type Cd  to get to C   Type   jsc  t library C  MyEval js  A new file is created named MyEval dll  Copy MyEval dll to the project and reference it  also reference Microsoft Jscript dll   Then you should be able to call it like this   Dim jScriptEvaluator As New EvalClass Dim objResult As Object objResult   jScriptEvaluator Evaluate    1  1  amp  amp  2  2        objResult is True

User · Answer

The open source JavaScript interpreter Jint  http   jint codeplex com  does exactly what you are looking for   Edit   The project has been entirely rewritten and is now hosted on Github at https   github com sebastienros jint

User · Answer

I just tried RemObjects Script for  Net   It works  although I had to use a static factory  var a A createA     from JavaScript instead of the var a new A   syntax   ExposeType function only exposes statics   Not much documentation and the source is written with Delphi Prism  which is rather unusual for me and the RedGate Reflector   So  Easy to use and setup  but not much help for advanced scenarios   Also having to install something instead of just dropping the assemblies in a directory is a negative for me

User · Answer

I know I m opening up an old thread but I ve done a lot of work on smnet  spidermonkey-dotnet   In the recent years  It s main development focus has been seamless embedding of  net objects into the spidermonkey engine  It supports a wide variety of conversions from js values to  net objects  Some of those including delegates and events   Just saying it might be worth checking into now that there s some steady development on it     I do keep the SVN repo up to date with bug fixes and new features  The source and project solution files are configured to successfully build on download  If there are any problems using it  feel free to open a discussion   I do understand the desire to have a managed javascript solution  but of all the managed javascript s I ve used they re all very lacking in some key features that help make them both robust and easy to work with  I myself am waiting on IronJS to mature a little  While I wait  I have fun playing with spidermonkey-dotnet      spidermonkey-dotnet project and download page  Edit  created documentation wiki page this afternoon

User · Answer

Use JSCRIPT NET to get a library dll  of the js   Then reference this dll in your  NET application and you are just there  DONE

User · Answer

If the language isn t a problem  any sandboxed scripted one  then there s LUA for  NET  The Silverlight version of the  NET framework is also sandboxed afaik

User · Answer

If the language isn t a problem  any sandboxed scripted one  then there s LUA for  NET  The Silverlight version of the  NET framework is also sandboxed afaik

User · Answer

You might also be interested in Microsoft ClearScript which is hosted on GitHub and published under the Ms-Pl licence   I am no Microsoft fanboy  but I must admit that the V8 support has about the same functionnalities as Javascript Net  and more important  the project is still maintained  As far as I am concerned  the support for delegates also functions better than with Spidermonkey-dotnet   ps  It also support JScript and VBScript but we were not interested by this old stuff   ps  It is compatible with  NET 4 0 and 4 5

User · Answer

i believe all the major opensource JS engines  JavaScriptCore  SpiderMonkey  V8  and KJS  provide embedding APIs   The only one I am actually directly familiar with is JavaScriptCore   which is name of the JS engine the SquirrelFish lives in  which provides a pure C API   If memory serves  it s been a while since i used  NET   NET has fairly good support for linking in C API s   I m honestly not sure what the API s for the other engines are like  but I do know that they all provide them   That said  depending on your purposes JScript NET may be best  as all of these other engines will require you to include them with your app  as JSC is the only one that actually ships with an OS  but that OS is MacOS  D

User · Answer

Microsoft s documented way to add script extensibility to anything is IActiveScript   You can use IActiveScript from within anyt  NET app  to call script logic   The logic can party on  NET objects that you ve placed into the scripting context    This answer provides an application that does it  with code     Will the IE10 Chakra JScript engine available as stand alone accessible from C

User · Answer

There is also MsieJavaScriptEngine which uses Internet Explorers Chakra engine

User · Answer

Try ReoScript  an open-source JavaScript interpreter implemented in C    ReoScript makes your application can execute JavaScript  It has a wide variety of extension methons such as SetVariable  Function Extension  using CLR Type   Net Event Binding and etc    Hello World   ScriptRunningMachine srm   new ScriptRunningMachine    srm Run   alert  hello world           And here is an example of script that creates a winform and show it   import System Windows Forms              import namespace  var f   new Form                         create form f click   function     f close           close when user clicked on form  f show                                   show

User · Answer

You can try ironJS  looks promising although it is in heavy development  https   github com fholm IronJS

User · Answer

Anybody just tuning in check out Jurassic as well    http   jurassic codeplex com   edit  this has moved to github  and seems active at first glance   https   github com paulbartrum jurassic

User · Answer

i believe all the major opensource JS engines  JavaScriptCore  SpiderMonkey  V8  and KJS  provide embedding APIs   The only one I am actually directly familiar with is JavaScriptCore   which is name of the JS engine the SquirrelFish lives in  which provides a pure C API   If memory serves  it s been a while since i used  NET   NET has fairly good support for linking in C API s   I m honestly not sure what the API s for the other engines are like  but I do know that they all provide them   That said  depending on your purposes JScript NET may be best  as all of these other engines will require you to include them with your app  as JSC is the only one that actually ships with an OS  but that OS is MacOS  D

User · Answer

Hey take a look for Javascript  NET on codeplex  http   javascriptdotnet codeplex com   with the version 0 3 1 there is some pretty sweet new features that will probly interest you   Check out a sample code      Initialize the context JavascriptContext context   new JavascriptContext        Setting the externals parameters of the context context SetParameter  console   new SystemConsole     context SetParameter  message    Hello World      context SetParameter  number   1       Running the script context Run  var i  for  i   0  i  lt  5  i    console Print message          i         number    i         Getting a parameter Console WriteLine  number      context GetParameter  number

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