javascript – 可以使JavasScript函数的行为好像是一个字符串,no()

这是可能的吗,还是我在这里树上错误的树？ @H_607_2@var data = 'one'; function fnc(){ this.out = function(){ return data; } } var instance = new fnc(); alert(instance.out); data = 'two'; alert(instance.out); // I know that this would achieve that,but that's not what I would like to know. alert(instance.out()); data = 'two'; alert(instance.out());

更新：

fnc应该表示的对象实际上是Sarissa dom文档.这是一个更精细的版本的fnc(),dom_doc().下面接受的答案已经被整合到下面的功能中.

@H_607_2@function get_doc(dom_nodE) { var doc; if (navigator.userAgent.indexOf("MSIE") >= 0) { doc = new ActiveXObject("Msxml2.DOMDocument.3.0"); doc.loadXML(document.getElementById(dom_nodE).text); } else { doc = Sarissa.getDomDocument(); doc = (new DOMParser()).parseFromString(document.getElementById(dom_nodE).textContent,"text/xml"); // runs XSLTProcessor in modern browsers as if it was trasformNode doc.transformNode = function (stylesheet) { var processor = new XSLTProcessor(); processor.importStylesheet(stylesheet); return new XMLserializer().serializeToString(processor.transformToDocument(this)); } // allows modern browsers to extract xml the way the legacy IEs did var getXML = {}; getXMl.toString = function(){ return new XMLserializer().serializeToString(doc); }; doc.xml = getXML; } return doc; }

演示：JSFIDDLE