destroy
当我们使用 jQuery ui 小部件时,幕后发生了什么。
前任:$('#test').tabs('destroy')
如果您查看小部件工厂的源代码,您会注意到发生的情况是,它将删除小部件首次初始化时添加到 DOM 的多余元素、类和绑定事件。简而言之,它将有效地将目标元素恢复到其原始状态。
这是小部件工厂第 188 行的摘录:
destroy: function() {
this._destroy();
// we can probably remove the unbind calls in 2.0
// all event bindings should go through this._bind()
this.element
.unbind( "." + this.widgetName )
.removeData( this.widgetName );
this.widget()
.unbind( "." + this.widgetName )
.removeAttr( "aria-disabled" )
.removeClass(
this.widgetBaseClass + "-disabled " +
"ui-state-disabled" );
// clean up events and states
this.bindings.unbind( "." + this.widgetName );
this.hoverable.removeClass( "ui-state-hover" );
this.focusable.removeClass( "ui-state-focus" );
},
小部件通过对内部方法进行原型设计来实现它们自己的清理例程_destroy
(这是工厂中的无操作方法,即它不做任何事情;您可以看到它在方法开始时被调用destroy
)。选项卡小部件第 466 行的摘录如下所示:
_destroy: function() {
var o = this.options;
if ( this.xhr ) {
this.xhr.abort();
}
this.element.removeClass( "ui-tabs ui-widget ui-widget-content ui-corner-all ui-tabs-collapsible" );
this.list.removeClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" );
this.anchors.each(function() {
var $this = $( this ).unbind( ".tabs" );
$.each( [ "href", "load" ], function( i, prefix ) {
$this.removeData( prefix + ".tabs" );
});
});
this.lis.unbind( ".tabs" ).add( this.panels ).each(function() {
if ( $.data( this, "destroy.tabs" ) ) {
$( this ).remove();
} else {
$( this ).removeClass([
"ui-state-default",
"ui-corner-top",
"ui-tabs-active",
"ui-state-active",
"ui-state-disabled",
"ui-tabs-panel",
"ui-widget-content",
"ui-corner-bottom"
].join( " " ) );
}
});
return this;
},