Function Animation

2.0.3/Animation.js:85–189

(elem, properties, options)

}

function Animation(elem, properties, options) {
    var result,
        stopped,
        index = 0,
        length = animationPrefilters.length,
        deferred = jQuery.Deferred().always(function() {
            // don't match elem in the :animated selector
            delete tick.elem;
        }),
        tick = function() {
            if (stopped) {
                return false;
            }
            var currentTime = fxNow || createFxNow(),
                remaining = Math.max(0, animation.startTime + animation.duration - currentTime),
                // archaic crash bug won't allow us to use 1 - ( 0.5 || 0 ) (#12497)
                temp = remaining / animation.duration || 0,
                percent = 1 - temp,
                index = 0,
                length = animation.tweens.length;

            for (; index < length; index++) {
                animation.tweens[index].run(percent);
            }

            deferred.notifyWith(elem, [animation, percent, remaining]);

            if (percent < 1 && length) {
                return remaining;
            } else {
                deferred.resolveWith(elem, [animation]);
                return false;
            }
        },
        animation = deferred.promise({
            elem               : elem,
            props              : jQuery.extend({}, properties),
            opts               : jQuery.extend(true, {
            specialEasing      : {}
            }, options),
            originalProperties : properties,
            originalOptions    : options,
            startTime          : fxNow || createFxNow(),
            duration           : options.duration,
            tweens             : [],
            createTween: function(prop, end) {
                var tween = jQuery.Tween(elem, animation.opts, prop, end,
                    animation.opts.specialEasing[prop] || animation.opts.easing);
                animation.tweens.push(tween);
                return tween;
            },
            stop: function(gotoEnd) {
                var index = 0,
                    // if we are going to the end, we want to run all the tweens
                    // otherwise we skip this part
                    length = gotoEnd ? animation.tweens.length : 0;
                if (stopped) {
                    return this;