Go

JavaScript console

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Demonstrates console output using Chilkat JavaScript. Go

    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.
    sbScript := chilkat.NewStringBuilder()
    success = sbScript.LoadFile("qa_data/js_tests/test_console.js","utf-8")
    if success == false {
        fmt.Println(sbScript.LastErrorText())
        sbScript.DisposeStringBuilder()
        return
    }

    js := chilkat.NewJs()
    result := chilkat.NewJsonObject()

    // 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 {
        fmt.Println(sbScript.LastErrorText())
        sbScript.DisposeStringBuilder()
        js.DisposeJs()
        result.DisposeJsonObject()
        return
    }

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

    // The console output is retrieved by calling ConsoleOutputSb
    sbOut := chilkat.NewStringBuilder()
    js.ConsoleOutputSb(sbOut)
    fmt.Println(*sbOut.GetAsString())

    sbScript.DisposeStringBuilder()
    js.DisposeJs()
    result.DisposeJsonObject()
    sbOut.DisposeStringBuilder()