Automatically resize text area based on content [duplicate]

Answer 1

Since I wasn't too happy with several solutions I found on the web, here's my take on it.

Respects min-height, max-height. Avoids jumping around and flashing the scrollbar by adding a buffer to the height (currently 20, may replace by line-height). However still shows scrollbar when max-height is reached. Avoids resetting the container scroll position by incrementally reducing the textarea height instead of setting it to 0. Will thusly also remove all deleted rows at once. Works in IE and Chrome without browser sniffing.

http://jsfiddle.net/Nd6B3/4/

#ta {
    width:250px;
    min-height:116px;
    max-height:300px;
    resize:none;
}

$("#ta").keyup(function (e) {
    autoheight(this);
});

function autoheight(a) {
    if (!$(a).prop('scrollTop')) {
        do {
            var b = $(a).prop('scrollHeight');
            var h = $(a).height();
            $(a).height(h - 5);
        }
        while (b && (b != $(a).prop('scrollHeight')));
    };
    $(a).height($(a).prop('scrollHeight') + 20);
}

autoheight($("#ta"));