Visual FoxPro

JavaScript console

See more JavaScript Examples

Demonstrates console output using Chilkat JavaScript. Visual FoxPro

LOCAL lnSuccess
LOCAL loSbScript
LOCAL loJs
LOCAL loResult
LOCAL loSbOut

lnSuccess = 0

* This example demonstrates using the built-in console object.
* The Javascript run in this example is shown below.

* Load the JavaScript from a file.
loSbScript = CreateObject('Chilkat.StringBuilder')
lnSuccess = loSbScript.LoadFile("qa_data/js_tests/test_console.js","utf-8")
IF (lnSuccess = 0) THEN
    ? loSbScript.LastErrorText
    RELEASE loSbScript
    CANCEL
ENDIF

loJs = CreateObject('Chilkat.Js')
loResult = CreateObject('Chilkat.JsonObject')

* Run the JavaScript
* Results (not console output) go to result.
* Note: 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 console.log which does not calculate a value. Therefore, it returns undefined.
lnSuccess = loJs.Eval(loSbScript,loResult)
IF (lnSuccess = 0) THEN
    ? loSbScript.LastErrorText
    RELEASE loSbScript
    RELEASE loJs
    RELEASE loResult
    CANCEL
ENDIF

* We can look at the result, which is "undefined", which is normal and expected.
? loResult.Emit()
* The result JSON is: {"type":"undefined","value":"undefined"}

* The console output is retrieved by calling ConsoleOutputSb
loSbOut = CreateObject('Chilkat.StringBuilder')
loJs.ConsoleOutputSb(loSbOut)
? loSbOut.GetAsString()

RELEASE loSbScript
RELEASE loJs
RELEASE loResult
RELEASE loSbOut