Hello Matthew,
Currently the TextArea has a Width parameter and we will expose Height in a future release. Now you can apply a height style with CSS, as shown in the linked thread.
Basically, Rows and Cols affect textarea width and height, so that the component displays a fixed number of characters horizontally and vertically. This effect can be achieved if you set width and height in relative units, which are tied to the font size.
Can Width and Height serve your requirements? If not, please describe your use case and needs in detail, so that we can consider them.
Regards,
Dimo
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