Make sure that width or height don't animate to a negative value. Fixes #3881.

[jquery.git] / src / fx.js

diff --git a/src/fx.js b/src/fx.js
index d3a7ad4..15fce5c 100644 (file)
--- a/src/fx.js
+++ b/src/fx.js
@@ -432,7 +432,7 @@ jQuery.extend( jQuery.fx, {
 
                _default: function(fx){
                        if ( fx.elem.style && fx.elem.style[ fx.prop ] != null ) {
-                               fx.elem.style[ fx.prop ] = fx.now + fx.unit;
+                               fx.elem.style[ fx.prop ] = (fx.prop === "width" || fx.prop === "height" ? Math.max(0, fx.now) : fx.now) + fx.unit;
                        } else {
                                fx.elem[ fx.prop ] = fx.now;
                        }