Classic ASP

Eval JavaScript Returning Int

Demonstrates getting the completion value of a JavaScript that returns an integer.

Chilkat Classic ASP Downloads

Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

'  This example demonstrates getting the completion value of a script,
'  where the last evaluated expression is an integer.

'  The Javascript run in this example is shown below.

'  Load the JavaScript from a file.
set sbScript = Server.CreateObject("Chilkat.StringBuilder")
success = sbScript.LoadFile("js_eval_return_int.js","utf-8")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( sbScript.LastErrorText) & "</pre>"
    Response.End
End If

set js = Server.CreateObject("Chilkat.Js")
set result = Server.CreateObject("Chilkat.JsonObject")

'  Run the JavaScript
'  Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
'  In this case, the last evaluated expression is an int.
success = js.Eval(sbScript,result)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( sbScript.LastErrorText) & "</pre>"
    Response.End
End If

result.EmitCompact = 0
Response.Write "<pre>" & Server.HTMLEncode( result.Emit()) & "</pre>"

'  Output:

'  {
'    "type": "int",
'    "value": 42
'  }

%>
</body>
</html>

JavaScript

const base = 10;
const multiplier = 4;
const offset = 2;

// The last line is a calculation resulting in an integer
// Returns 42.
(base * multiplier) + offset;