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-rw-r--r--src/effects.js5
1 files changed, 2 insertions, 3 deletions
diff --git a/src/effects.js b/src/effects.js
index 1536d2d8e..790a63c8e 100644
--- a/src/effects.js
+++ b/src/effects.js
@@ -634,9 +634,8 @@ jQuery.extend( jQuery.fx, {
}
});
-// Adds width/height step functions
-// Do not set anything below 0
-jQuery.each([ "width", "height" ], function( i, prop ) {
+// Ensure props that can't be negative don't go there on undershoot easing
+jQuery.each( fxAttrs.concat.apply( [], fxAttrs ), function( i, prop ) {
jQuery.fx.step[ prop ] = function( fx ) {
jQuery.style( fx.elem, prop, Math.max(0, fx.now) + fx.unit );
};