Function Animation

src/modules/jquery.js:7596–7733

(elem, properties, options)

  }

  function Animation(elem, properties, options) {
    var result,
      stopped,
      index = 0,
      length = Animation.prefilters.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
          ),
          // Support: Android 2.3 only
          // Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (trac-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 there's more to do, yield
        if (percent < 1 && length) {
          return remaining;
        }

        // If this was an empty animation, synthesize a final progress notification
        if (!length) {
          deferred.notifyWith(elem, [animation, 1, 0]);
        }

        // Resolve the animation and report its conclusion
        deferred.resolveWith(elem, [animation]);
        return false;
      },
      animation = deferred.promise({
        elem: elem,
        props: jQuery.extend({}, properties),
        opts: jQuery.extend(
          true,
          {
            specialEasing: {},
            easing: jQuery.easing._default
          },
          options
        ),
        originalProperties: properties,
        originalOptions: options,