Fix #3827. Get the correct checkbox status for a click handler.

src/event.js

@@ -263,7 +263,7 @@ jQuery.event = {
 
 		// Allow special events to draw outside the lines
 		special = jQuery.event.special[ type ] || {};
-		if ( special.trigger && special.trigger.apply( elem, data ) === false ) {
+		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
 			return;
 		}
 
@@ -523,7 +523,15 @@ jQuery.event = {
 			// Prevent triggered image.load events from bubbling to window.load
 			noBubble: true
 		},
-
+		click: {
+			// For checkbox, fire native event so checked state will be right
+			trigger: function() {
+				if ( jQuery.nodeName( this, "input") && this.type === "checkbox" && this.click ) {
+					this.click();
+					return false;
+				}
+			}
+		},
 		focus: {
 			delegateType: "focusin"
 		},

test/unit/event.js

@@ -2831,6 +2831,35 @@ test("clone() delegated events (#11076)", function() {
 	clone.remove();
 });
 
+test("checkbox state (#3827)", function() {
+	expect( 9 );
+
+	var markup = jQuery("<div><input type=checkbox><div>").appendTo("#qunit-fixture"),
+		cb = markup.find("input")[0];
+
+	jQuery(cb).on( "click", function(){
+		equal( this.checked, false, "just-clicked checkbox is not checked" );
+	});
+	markup.on( "click", function(){
+		equal( cb.checked, false, "checkbox is not checked in bubbled event" );
+	});
+
+	// Native click
+	cb.checked = true;
+	equal( cb.checked, true, "native - checkbox is initially checked" );
+	cb.click();
+	equal( cb.checked, false, "native - checkbox is no longer checked" );
+
+	// jQuery click
+	cb.checked = true;
+	equal( cb.checked, true, "jQuery - checkbox is initially checked" );
+	jQuery( cb ).click();
+	equal( cb.checked, false, "jQuery - checkbox is no longer checked" );
+
+	// Handlers only; checkbox state remains false
+	jQuery( cb ).triggerHandler( "click" );
+});
+
 test("fixHooks extensions", function() {
 	expect( 2 );
 

test/unit/manipulation.js

@@ -100,7 +100,7 @@ var testWrap = function(val) {
 		ok( checkbox.checked, "Checkbox's state is erased after wrap() action, see #769" );
 		jQuery(checkbox).wrap(val( "<div id='c1' style='display:none;'></div>" ));
 		ok( checkbox.checked, "Checkbox's state is erased after wrap() action, see #769" );
-	}).click();
+	}).prop( "checked", false )[0].click();
 
 	// using contents will get comments regular, text, and comment nodes
 	var j = jQuery("#nonnodes").contents();