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Javascript Host inside PowerShell allowing the execution of Javascript, TypeScript from PowerShell. In the future also CoffeeScript, FunScript and SweetJS Macros
JavaScript TypeScript C# Other
branch: master

PowerShell.JS - JavaScript hosted inside PowerShell.

This Project will Host MS's Chakra Javascript Engine inside of PowerShell, providing Cmdlets to execute arbitary Javascript, Javascript Functions from within PowerShell Now Supporting TypeScript 1.0


  • Run Arbitary JS from within PowerShell.
  • Ability to have JSSessions so you can have more than one JS runtime active at a time.
    • get-JSSession -> list in the session in the environment. (or get a specific one).
    • New-JSSession -> ability to create a JS runtime environment with various options.
    • Remove-JSSesson -> remove a JS runtime environment.
  • Load JS files into a JSSession.
  • Load JS files.
  • Run JS functions from PS, passing in properties.
  • return JS results to PowerShell.
  • Get-JSfunction -session X : List functions in a JS session (possibly in the future a provider).
  • Get-JSVariable -Session X : List (or get a specific) variable from JS session.
  • Set-JSVariable -Session X : sets the value of a JS var.
  • Variables , Results and Arguments.
    • transform compatible types automatically (i.e string, bool, int, double (depending on number in JS ), null etc.
    • ability to provide transformation functions.
    • other objects on the way in get transformed into JSON, and on the way out can come as JSON, or get
      transformed to PSCustomObjects.
  • Invoke-JS - main way to run JS
    • a way to invoke it simply where a session is created and destroyed at the end.
    • ability to create a new session with this.
    • ability to run code without returning any values.
    • ability to take in PS arguments, and pass them (and if needed transform them).
    • ability to return results as correct PS types, or JSON or PScustomObject.
  • Invoke-JSfunction -Name ... -Session -Arguments : Ability to call a JS function in a session.
  • New-JSproxy - Ability to take a JS function (or functions) and generate a PS wrapper.

MidTerm Goals

  • Call Back to PowerShell.
  • Access PS variables from within JS.
  • Ability to submit PS events.
  • various package distributions (Joels, Chocolatey , Nuget)
  • CoffeeScript and TypeScript support (include those libraries automatically, and functions that will parse,compile,and execute them)


  • any WebServer or trying to be Node.JS.

Possible Future Scope

  • Enter-JSSession - basically a Javascript REPL interface not too unlike Node.JS
  • Start-JSJob - aysnc sessions that work like jobs. working behind the scenes, either it will plug into the PSJob framework with | Wait-job and Receive-Job or at least work in a consistant manner. (Wait-JSJob , Receive-JSJob).
  • Object to do Ajax calls.


 ipmo PowerChakra -Force

 #invoke a simple expression
 invoke-js "5+5"

 New-JSSession -Name test
 #invoke an expression, in a session, and DON'T RETURN RESULTS
 Invoke-JS -Name test -Script "var x = 5; function add(y){return y+y}" -NoResults
 #reuse the session, running a function previously applied AND return results.
 Invoke-JS -Name test -Script "add(x,10)"

 #create a nested PS object
 invoke-JS -Name test -Script "var ourobj = {name : 'PowerChakra', numbers : [1,2,3] , something: { x:1}  }" -NoResults
 #get object as JSON, then convert to PS object 
 $objectasJSON = invoke-JS -Name test -Script "JSON.stringify(ourobj)"
 $objectasPSobj = ConvertFrom-Json $objectasJSON
 $objectasPSobj | fl

A TypeScript Example

ipmo PowerShellJS -Force
$null = New-JSSession -Name test
Invoke-TypeScript -name test -script "1+1"
Invoke-TypeScript -name test -script "var adder = x => x * x" -NoResults
Invoke-JS -name test -Script "adder(5)"


Copy PSModule/PowerShellJS to your PowerShellModules folder, then load with Import-Module

Random Notes

SessionID and Name Call backs JS exceptions.


(C) 2013-2014 ShellTools LLC. Released under Microsoft Public License (Ms-PL)

The .Net Javascript Wrapper is derived from MSieJavaScriptEngine Microsoft Public License (Ms-PL)


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