(JavaScript) JavaScript console

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Note: This example requires Chilkat v11.4.0 or greater.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var 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.
var sbScript = new CkStringBuilder();
success = sbScript.LoadFile("qa_data/js_tests/test_console.js","utf-8");
if (success == false) {
    console.log(sbScript.LastErrorText);
    return;
}

var js = new CkJs();
var result = new CkJsonObject();

// 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) {
    console.log(sbScript.LastErrorText);
    return;
}

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

// The console output is retrieved by calling ConsoleOutputSb
var sbOut = new CkStringBuilder();
js.ConsoleOutputSb(sbOut);
console.log(sbOut.GetAsString());