This is to be achieved using the CSS resize
property which needs to be set to none
.
E.g.
<h:inputTextarea ... style="resize: none" />
or, better,
<h:inputTextarea ... styleClass="unresizable" />
with this in a fullworthy CSS file
.unresizable {
resize: none;
}
The same story applies to the PrimeFaces equivalent <p:inputTextarea>
. You wasn't exactly clear on which one you were using. Your question title and body implied standard JSF, but you tagged PrimeFaces.