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New versions of JavaFX WebView no longer keep references to Java objects passed into the view. As such FXConsole object (used for callback from console.log & co.) is no longer working.
Fixed in https://github.com/jtulach/html-java-api/commit/ed4d605378dcc4bc0c111069b80913d8756ace9e This would probably deserve an update of HTML/Java API in NetBeans as well.
Part of version 1.5 and used in Apache NetBeans.