(AutoIt) Call a JavaScript Function Returning a String

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Note: This example requires Chilkat v11.4.0 or greater.

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Local $bSuccess = False

; This is the JavaScript function we'll call:

; function greet(name) {
;     return "Hello, " + name + "!";
; }

$oSbScript = ObjCreate("Chilkat.StringBuilder")
$oSbScript.Append("function greet(name) { return ""Hello, "" + name + ""!""; }")

$oJs = ObjCreate("Chilkat.Js")

$oResult = ObjCreate("Chilkat.JsonObject")
$oResult.EmitCompact = False

; Call Eval to add the function to the context's global object
$bSuccess = $oJs.Eval($oSbScript,$oResult)
If ($bSuccess = False) Then
    ; Examine the result for an exception.
    ConsoleWrite($oResult.Emit() & @CRLF)

    ; Also examine the LastErrorText.
    ConsoleWrite($oJs.LastErrorText & @CRLF)
    Exit
EndIf

; ------------------------------------------------------------------------------
; Call the function greet("Michael")

$oFuncCall = ObjCreate("Chilkat.JsonObject")

; Create JSON specifying the function name and arguments

; {
;   "name": "greet",
;   "args": [ "Michael" ]
; }

$oFuncCall.UpdateString("name","greet")
$oFuncCall.UpdateString("args[0]","Michael")

$bSuccess = $oJs.CallFunction($oFuncCall,$oResult)
If ($bSuccess = False) Then
    ; Examine the result for an exception.
    ConsoleWrite($oResult.Emit() & @CRLF)

    ; Also examine the LastErrorText.
    ConsoleWrite($oJs.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite($oResult.Emit() & @CRLF)

; Output:
; {
;   "type": "string",
;   "value": "Hello, Michael!"
; }

Local $sRetval = $oResult.StringOf("value")
ConsoleWrite($sRetval & @CRLF)

; Output:
; Hello, Michael!