From Ignition Support this code worked.
from com.teamdev.jxbrowser.chromium.events import ConsoleListener
target='Web Browser'
browser = system.gui.getParentWindow(event).getComponentForPath('Root Container.browser').getBrowser()
class IgnitionListener(ConsoleListener):
def __init__(self, target='Web Browser'):
self.logger = system.util.getLogger(target)
self.levels = {'DEBUG': self.logger.debug, 'ERROR': self.logger.error, 'LOG': self.logger.info, 'WARNING': self.logger.warn}
def onMessage(self, event):
self.levels[str(event.getLevel())](event.getMessage())
browser.addConsoleListener(IgnitionListener(target))