Don't overwrite css properties, but add to them with jQuery

Question

I just want to know how to use the jquery .css() function to not overwrite, but to add additional values to css properties.

For instance, I have an element that is curre

Answer 1

Save the current style, then concatenate:

var rotation = 0;
function rotate() {
    rotation += 90;
    var rotationString = 'rotate(' + rotation + 'deg)';
    var current = $('#square').css('transform');
    $('#square').css('transform', current +' '+ rotationString);
}

http://jsfiddle.net/oqqubda8/

It works, and I don't know if there's another way to do it.