jQuery 1.9.1源码分析系列（十）事件系统之主动触发事件和模拟冒

// 在special.change.handle中会吞掉失焦触发的change事件.
// 这里任然会在check/radio失焦后触发onchange事件.
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;
}
// 事件代理; 懒惰模式为后代input节点添加change事件处理
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;
// 吞掉本地单选框和复选框的change事件,我们在上面已经出发了事件
if ( this !== elem || event.isSimulated || event.isTrigger || (elem.type !== "radio" && elem.type !== "checkbox") ) {
return event.handleObj.handler.apply( this, arguments );
}
},
　　　　}

　　OK,到此，事件系统也告一个段落了，谢谢大家多多支持。