How to render a textarea input field
_input elements of type="textarea" create larger text input fields that let the user enter a text. This differs from original HTML5 as textarea is not part of an input field, but an input type on its own. It also differs from other _input fields as there is no value you can set. Instead you use an opening _input type and a closing one. The value will be in between. See example.
For all supported argument have a look at the link at the links section.
<_input type="textarea" name="comment" placeholder="Type your comment" required="required">This is the text value</_input>