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在console中執(zhí)行如下：

var?aQuery?=?function(selector)?{
????
	if?(!(this?instanceof?aQuery))?{
???????????????console.log(this);?//window
???????????????console.log('zeze');//zeze
????????????????return?new?aQuery(selector);//疑問(wèn)：這塊不是直接return了嗎？為何下面的ddd會(huì)輸出。
	}
????????console.log('ddd');//ddd?
	var?elem?=?document.getElementById(/[^#].*/.exec(selector)[0]);
	this.length?=?1;
	this[0]?=?elem;
	this.context?=?document;
	this.selector?=?selector;
	this.get?=?function(num)?{
		return?this[num];
	}??
????????console.log(this);?//aQuery
	return?this;
}?
aQuery('#hehe').length;?//1