How to expand node's size dynamically when the text in its textBlock is being entered?

@sheraz104 wrote:

I want to dynamically expand/shrink the size of Node depending upon the length of characters being entered in the textBlock of Node. Currently when I focus textblock, an HTML kind of text element appear over the Node and as I type larger number of characters, the textblock expands out of the Node. And only when I focus out of the textBlock does the Node itself increase in size.

I want to expand the Node's size as I enter the text in textBlock and not just after the focus is out.

Kindly let me know if my question is not clear.

Thanks

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