Is there a way to get a textarea to stretch to fit its content without using PHP or JavaScript?

Question

I am filling a textarea with content for the user to edit.

Is it possible to make it stretch to fit content with CSS (like overflow:show for a div)?

Answer 1

Here is a function that works with jQuery (for height only, not width):

function setHeight(jq_in){
    jq_in.each(function(index, elem){
        // This line will work with pure Javascript (taken from NicB's answer):
        elem.style.height = elem.scrollHeight+'px'; 
    });
}
setHeight($(''));

Note: The op asked for a solution that does not use Javascript, however this should be helpful to many people who come across this question.