html
jQuery.Event.prototype = {
isDefaultPrevented: returnFalse,
isPropagationStopped: returnFalse,
isImmediatePropagationStopped: returnFalse,

preventDefault: function() {
var e = this.originalEvent;

this.isDefaultPrevented = returnTrue;
if ( !e ) {
return;
}

// If preventDefault exists, run it on the original event
if ( e.preventDefault ) {
e.preventDefault();

// Support: IE
// Otherwise set the returnValue property of the original event to false
} else {
e.returnValue = false;
}
},
stopPropagation: function() {
var e = this.originalEvent;

this.isPropagationStopped = returnTrue;
if ( !e ) {
return;
}
// If stopPropagation exists, run it on the original event
if ( e.stopPropagation ) {
e.stopPropagation();
}

// Support: IE
// Set the cancelBubble property of the original event to true
e.cancelBubble = true;
},
stopImmediatePropagation: function() {
var e = this.originalEvent;

this.isImmediatePropagationStopped = returnTrue;

if ( e && e.stopImmediatePropagation ) {
e.stopImmediatePropagation();
}

this.stopPropagation();
}
};

// Create mouseenter/leave events using mouseover/out and event-time checks
jQuery.each({
mouseenter: "mouseover",
mouseleave: "mouseout",
pointerenter: "pointerover",
pointerleave: "pointerout"
}, function( orig, fix ) {
jQuery.event.special[ orig ] = {
delegateType: fix,
bindType: fix,

handle: function( event ) {
var ret,
target = this,
related = event.relatedTarget,
handleObj = event.handleObj;

// For mousenter/leave call the handler if related is outside the target.
// NB: No relatedTarget if the mouse left/entered the browser window
if ( !related || (related !== target && !jQuery.contains( target, related )) ) {
event.type = handleObj.origType;
ret = handleObj.handler.apply( this, arguments );
event.type = fix;
}
return ret;
}
};
});

// IE submit delegation
if ( !support.submitBubbles ) {

jQuery.event.special.submit = {
setup: function() {
// Only need this for delegated form submit events
if ( jQuery.nodeName( this, "form" ) ) {
return false;
}

// Lazy-add a submit handler when a descendant form may potentially be submitted
jQuery.event.add( this, "click._submit keypress._submit", function( e ) {
// Node name check avoids a VML-related crash in IE (#9807)
var elem = e.target,
form = jQuery.nodeName( elem, "input" ) || jQuery.nodeName( elem, "button" ) ? elem.form : undefined;
if ( form && !jQuery._data( form, "submitBubbles" ) ) {
jQuery.event.add( form, "submit._submit", function( event ) {
event._submit_bubble = true;
});
jQuery._data( form, "submitBubbles", true );
}
});
// return undefined since we don't need an event listener
},

postDispatch: function( event ) {
// If form was submitted by the user, bubble the event up the tree
if ( event._submit_bubble ) {
delete event._submit_bubble;
if ( this.parentNode && !event.isTrigger ) {
jQuery.event.simulate( "submit", this.parentNode, event, true );
}
}
},

teardown: function() {
// Only need this for delegated form submit events
if ( jQuery.nodeName( this, "form" ) ) {
return false;
}

// Remove delegated handlers; cleanData eventually reaps submit handlers attached above
jQuery.event.remove( this, "._submit" );
}
};
}

// IE change delegation and checkbox/radio fix
if ( !support.changeBubbles ) {

jQuery.event.special.change = {

setup: function() {

if ( rformElems.test( this.nodeName ) ) {
// IE doesn't fire change on a check/radio until blur; trigger it on click
// after a propertychange. Eat the blur-change in special.change.handle.
// This still fires onchange a second time for check/radio after blur.
if ( this.type === "checkbox" || this.type === "radio" ) {
jQuery.event.add( this, "propertychange._change", function( event ) {
if ( event.originalEvent.propertyName === "checked" ) {
this._just_changed = true;
}
});
jQuery.event.add( this, "click._change", function( event ) {
if ( this._just_changed && !event.isTrigger ) {
this._just_changed = false;
}
// Allow triggered, simulated change events (#11500)
jQuery.event.simulate( "change", this, event, true );
});
}
return false;
}
// Delegated event; lazy-add a change handler on descendant inputs
jQuery.event.add( this, "beforeactivate._change", function( e ) {
var elem = e.target;

if ( rformElems.test( elem.nodeName ) && !jQuery._data( elem, "changeBubbles" ) ) {
jQuery.event.add( elem, "change._change", function( event ) {
if ( this.parentNode && !event.isSimulated && !event.isTrigger ) {
jQuery.event.simulate( "change", this.parentNode, event, true );
}
});
jQuery._data( elem, "changeBubbles", true );
}
});
},

handle: function( event ) {
var elem = event.target;

// Swallow native change events from checkbox/radio, we already triggered them above
if ( this !== elem || event.isSimulated || event.isTrigger || (elem.type !== "radio" && elem.type !== "checkbox") ) {
return event.handleObj.handler.apply( this, arguments );
}
},

teardown: function() {
jQuery.event.remove( this, "._change" );

return !rformElems.test( this.nodeName );
}
};
}

// Create "bubbling" focus and blur events
if ( !support.focusinBubbles ) {
jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {

// Attach a single capturing handler on the document while someone wants focusin/focusout
var handler = function( event ) {
jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
};

jQuery.event.special[ fix ] = {
setup: function() {
var doc = this.ownerDocument || this,
attaches = jQuery._data( doc, fix );