Event: Restore the `constructor` property on jQuery.Event prototype

The original definition of the jQuery.Event prototype was paving over the
`constructor` property which was causing jQuery.isPlainObject to
improperly report that an instance of jQuery.Event was a plain object.

Fixes #15090
Closes gh-1580

(cherry picked from commit b807aedb7fee321fb3aa5d156a5a256ab0634e2d)

diff --git a/src/event.js b/src/event.js
index 8c4543cb5c3f0fa740619ed00ff63e5dca7c7e69..54451306d83089975fd14e3b409011aa35f0db8c 100644 (file)
--- a/src/event.js
+++ b/src/event.js
@@ -728,6 +728,7 @@ jQuery.Event = function( src, props ) {
 // jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
 // http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
 jQuery.Event.prototype = {
+       constructor: jQuery.Event,
        isDefaultPrevented: returnFalse,
        isPropagationStopped: returnFalse,
        isImmediatePropagationStopped: returnFalse,

diff --git a/test/unit/event.js b/test/unit/event.js
index 8bb168a40d79f2e72879a9ce05a2d9b13cb10e13..fb3b75abc5d04c67d023698dd0d06442e585c9d6 100644 (file)
--- a/test/unit/event.js
+++ b/test/unit/event.js
@@ -1511,7 +1511,7 @@ if ( window.onbeforeunload === null &&
 
 test("jQuery.Event( type, props )", function() {
 
-       expect(5);
+       expect(6);
 
        var event = jQuery.Event( "keydown", { keyCode: 64 }),
                        handler = function( event ) {
@@ -1527,6 +1527,8 @@ test("jQuery.Event( type, props )", function() {
 
        ok( "keyCode" in event, "Special 'keyCode' property exists" );
 
+       strictEqual( jQuery.isPlainObject( event ), false, "Instances of $.Event should not be identified as a plain object." );
+
        jQuery("body").on( "keydown", handler ).trigger( event );
 
        jQuery("body").off( "keydown" );