Flex – How to set the TextArea height to its content height

I have a mx: TextArea, I want it to be the same height as its content. Nothing special-just a non-editable text area and text. I need a simple and reliable method To make the control fit and display all text without vertical scrolling-just like a self It’s the same as when it is automatically resized. In addition, the text of my control will only be set once and will not be changed because it is not editable.

 editable="false"
 width="100%"
 verticalScrollPolicy="off" >
 
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There is also a here post on the same topic, but it has nothing to do with me because its setup is more complicated because it includes styles and bindings.

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Use the textHeight read-only property of TextArea, and set the height of TextArea to TextArea.textHeight The vertical padding used by TextArea plus the height of the top and bottom borders (check the TextArea component and calculate Out). This process should be carried out in the handler of the change event you added to the TextArea.