AutoIt Requires Chilkat v11.4.0+

Call a JavaScript Function Returning a String

See more JavaScript Examples

Demonstrates how to call a JavaScript function that returns a string. AutoIt

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!