Make sure that hide or show don't fail when operating on non-Element nodes. Fixes #6135.

src/effects.js

@@ -28,19 +28,22 @@ jQuery.fn.extend({
 		} else {
 			for ( var i = 0, j = this.length; i < j; i++ ) {
 				elem = this[i];
-				display = elem.style.display;
 
-				// Reset the inline display of this element to learn if it is
-				// being hidden by cascaded rules or not
-				if ( !jQuery._data(elem, "olddisplay") && display === "none" ) {
-					display = elem.style.display = "";
-				}
+				if ( elem.style ) {
+					display = elem.style.display;
+
+					// Reset the inline display of this element to learn if it is
+					// being hidden by cascaded rules or not
+					if ( !jQuery._data(elem, "olddisplay") && display === "none" ) {
+						display = elem.style.display = "";
+					}
 
-				// Set elements which have been overridden with display: none
-				// in a stylesheet to whatever the default browser style is
-				// for such an element
-				if ( display === "" && jQuery.css( elem, "display" ) === "none" ) {
-					jQuery._data(elem, "olddisplay", defaultDisplay(elem.nodeName));
+					// Set elements which have been overridden with display: none
+					// in a stylesheet to whatever the default browser style is
+					// for such an element
+					if ( display === "" && jQuery.css( elem, "display" ) === "none" ) {
+						jQuery._data(elem, "olddisplay", defaultDisplay(elem.nodeName));
+					}
 				}
 			}
 
@@ -48,10 +51,13 @@ jQuery.fn.extend({
 			// to avoid the constant reflow
 			for ( i = 0; i < j; i++ ) {
 				elem = this[i];
-				display = elem.style.display;
 
-				if ( display === "" || display === "none" ) {
-					elem.style.display = jQuery._data(elem, "olddisplay") || "";
+				if ( elem.style ) {
+					display = elem.style.display;
+
+					if ( display === "" || display === "none" ) {
+						elem.style.display = jQuery._data(elem, "olddisplay") || "";
+					}
 				}
 			}
 
@@ -75,7 +81,9 @@ jQuery.fn.extend({
 			// Set the display of the elements in a second loop
 			// to avoid the constant reflow
 			for ( i = 0; i < j; i++ ) {
-				this[i].style.display = "none";
+				if ( this[i].style ) {
+					this[i].style.display = "none";
+				}
 			}
 
 			return this;

test/unit/effects.js

@@ -88,6 +88,10 @@ test("show()", function() {
 		var elem = jQuery(selector, "#show-tests").show();
 		equals( elem.css("display"), expected, "Show using correct display type for " + selector );
 	});
+
+	// Make sure that showing or hiding a text node doesn't cause an error
+	jQuery("<div>test</div> text <span>test</span>").show().remove();
+	jQuery("<div>test</div> text <span>test</span>").hide().remove();
 });
 
 test("show(Number) - other displays", function() {