# Yahoo! UI Library

### anim 3.0.0b1

Yahoo! UI Library > anim > anim-color.js (source view)
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    /**
     * Adds support for color properties in <code>to</code>
     * and <code>from</code> attributes.
     * @module anim
     * @submodule anim-color
     */

    var NUM = Number;

    Y.Anim.behaviors.color = {
        set: function(anim, att, from, to, elapsed, duration, fn) {
            from = Y.Color.re_RGB.exec(Y.Color.toRGB(from));
            to = Y.Color.re_RGB.exec(Y.Color.toRGB(to));

            if (!from || from.length < 3 || !to || to.length < 3) {
                Y.error('invalid from or to passed to color behavior');
            }

            anim._node.setStyle(att, 'rgb(' + [
                Math.floor(fn(elapsed, NUM(from[1]), NUM(to[1]) - NUM(from[1]), duration)),
                Math.floor(fn(elapsed, NUM(from[2]), NUM(to[2]) - NUM(from[2]), duration)),
                Math.floor(fn(elapsed, NUM(from[3]), NUM(to[3]) - NUM(from[3]), duration))
            ].join(', ') + ')');
        },

        // TODO: default bgcolor const
        get: function(anim, att) {
            var val = anim._node.getComputedStyle(att);
            val = (val === 'transparent') ? 'rgb(255, 255, 255)' : val;
            return val;
        }
    };

    Y.each(['backgroundColor',
            'borderColor',
            'borderTopColor',
            'borderRightColor',
            'borderBottomColor',
            'borderLeftColor'],
            function(v, i) {
                Y.Anim.behaviors[v] = Y.Anim.behaviors.color;
            }
    );

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