Xojo Plugin

JavaScript console

See more JavaScript Examples

Demonstrates console output using Chilkat JavaScript. Xojo Plugin

Dim success As Boolean
success = False

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

// Load the JavaScript from a file.
Dim sbScript As New Chilkat.StringBuilder
success = sbScript.LoadFile("qa_data/js_tests/test_console.js","utf-8")
If (success = False) Then
    System.DebugLog(sbScript.LastErrorText)
    Return
End If

Dim js As New Chilkat.Js
Dim result As New 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.
success = js.Eval(sbScript,result)
If (success = False) Then
    System.DebugLog(sbScript.LastErrorText)
    Return
End If

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

// The console output is retrieved by calling ConsoleOutputSb
Dim sbOut As New Chilkat.StringBuilder
js.ConsoleOutputSb sbOut
System.DebugLog(sbOut.GetAsString())