Ruby

JavaScript console

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Demonstrates console output using Chilkat JavaScript. Ruby

require 'chilkat'

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::CkStringBuilder.new()
success = sbScript.LoadFile("qa_data/js_tests/test_console.js","utf-8")
if (success == false)
    print sbScript.lastErrorText() + "\n";
    exit
end

js = Chilkat::CkJs.new()
result = Chilkat::CkJsonObject.new()

# 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)
    print sbScript.lastErrorText() + "\n";
    exit
end

# We can look at the result, which is "undefined", which is normal and expected.
print result.emit() + "\n";
# The result JSON is: {"type":"undefined","value":"undefined"}

# The console output is retrieved by calling ConsoleOutputSb
sbOut = Chilkat::CkStringBuilder.new()
js.ConsoleOutputSb(sbOut)
print sbOut.getAsString() + "\n";