JavaScript 通过function创建对象的思考

1.返回类型为单一值

var fun1 = function() {
return 'this is factoryServices01';
};
console.log(typeof fun1); //function
console.log(typeof fun1()); //string，加括号后执行fun1函数

2.返回类型为复合对象

var fun2 = function() {
return {
name: 'kancy',
play: function() {
alert('hello');
},
address: {}
};
};
console.log(typeof fun2); //function
console.log(typeof fun2()); //object
console.log(typeof fun2().name); //string
//console.log(typeof fun2().name());  // 错误："Uncaught TypeError: string is not a function"
console.log(typeof fun2().play); //function
console.log(typeof fun2().play()); //undefined，因为没有return;但是alert正常执行
console.log(typeof fun2().address); //object
//console.log(typeof fun2().address());  // 错误："Uncaught TypeError: object is not a function"