Lianja Requires Chilkat v11.4.0+

Call a JavaScript Function Returning an Object

See more JavaScript Examples

Demonstrates how to call a JavaScript function that returns an object. Lianja

llSuccess = .F.

//  This is the JavaScript function we'll call:

//  function getSettings() {
//      return {
//          theme: "dark",
//          notifications: true,
//          version: 1.0
//      };
//  }

loSbScript = createobject("CkStringBuilder")
loSbScript.Append("function getSettings() {")
loSbScript.Append("    return {")
loSbScript.Append('        theme: "dark",')
loSbScript.Append("        notifications: true,")
loSbScript.Append("        version: 1.0")
loSbScript.Append("    };")
loSbScript.Append("}")

loJs = createobject("CkJs")

loResult = createobject("CkJsonObject")
loResult.EmitCompact = .F.

//  Call Eval to add the function to the context's global object
llSuccess = loJs.Eval(loSbScript,loResult)
if (llSuccess = .F.) then
    //  Examine the result for an exception.
    ? loResult.Emit()

    //  Also examine the LastErrorText.
    ? loJs.LastErrorText
    release loSbScript
    release loJs
    release loResult
    return
endif

//  ------------------------------------------------------------------------------
//  Call the function getSettings()

loFuncCall = createobject("CkJsonObject")

//  Create JSON specifying the function name and arguments
//  The function has no arguments, so we only specify the name.

//  {
//    "name": "getSettings",
//  }

loFuncCall.UpdateString("name","getSettings")

llSuccess = loJs.CallFunction(loFuncCall,loResult)
if (llSuccess = .F.) then
    //  Examine the result for an exception.
    ? loResult.Emit()

    //  Also examine the LastErrorText.
    ? loJs.LastErrorText
    release loSbScript
    release loJs
    release loResult
    release loFuncCall
    return
endif

? loResult.Emit()

//  Output:
//  {
//    "type": "object",
//    "value": {
//      "theme": "dark",
//      "notifications": true,
//      "version": 1
//    }
//  }

//  Examine the object's members
? "theme: " + loResult.StringOf("value.theme")
? "notifications: " + str(loResult.BoolOf("value.notifications"))
? "version: " + str(loResult.IntOf("value.version"))

//  Output:
//  theme: dark
//  notifications: True
//  version: 1


release loSbScript
release loJs
release loResult
release loFuncCall