function?aFun(){
????function?_(arg){
????????this.arg?=?arg;
????}
????_.prototype.testFun?=?function(){
????????console.log('this?is?prototype?testFun')
????};
????_.testFun2?=?function(){
????????console.log('this?is?testFunc2');
????}return?_;
};
var?afun?=?new?aFun('123');
console.log(afun?instanceof?aFun)
afun.testFun2();?//可以調用
afun.testFun();?//不是在原型鏈上么？，為啥不可以調用？？？，
var?aFun2?=?(function?(){
????function?_(arg){
????????this.arg?=?arg;
????}
????_.prototype.testFun?=?function(){
????console.log('this?is?prototype?testFun')
????};
????_.testFun2?=?function(){
????????console.log('this?is?testFunc2');
????}
????return?_;
})();
var?afun2?=?new?aFun2('ddd');
console.log(afun2?instanceof?aFun2)
afun2.testFun2();?//不可以調用，為啥？
afun2.testFun();?//可以調用，為啥可以？（我要瘋了）
JavaScript 函數返回值的問題。請高手解答下。
fshang
2018-08-28 14:29:24