Deeper investigation points me to componentHandler.register method - It looks like created component need to be registered and maybe than upgradeElement method will work.
Method register take: /** * Describes the type of a registered component type managed by * componentHandler. Provided for benefit of the Closure compiler. * * @typedef {{ * constructor: Function, * classAsString: string, * cssClass: string, * widget: (string|boolean|undefined) * }} */ componentHandler.ComponentConfigPublic; How actually register my created Tab ? :) Piotr ----- Apache Flex PMC piotrzarzyck...@gmail.com -- View this message in context: http://apache-flex-development.2333347.n4.nabble.com/FlexJS-MDL-Dynamic-Child-Problem-tp59595p59652.html Sent from the Apache Flex Development mailing list archive at Nabble.com.