Javascript oops：用原型定义函数或用原型定义函数(Javascript oops: defining function with or witout prototype)

Javascript oops：用原型定义函数或用原型定义函数(Javascript oops: defining function with or witout prototype)

以下是我的课程：

function myfunc(){ // some code }

1）声明类的方法/功能

myfunc.getInstance = function(){ // some code };

或者我可以定义如下：

myfunc.prototype.getInstance = function(){ // some code };

请告诉我使用或不使用原型定义方法/功能有什么区别。

Below is my class:

function myfunc(){ // some code }

1) declaring a method/function of a class

myfunc.getInstance = function(){ // some code };

Or alternatively i can define like below:

myfunc.prototype.getInstance = function(){ // some code };

Please tell me what is the difference between defining method/function with or without prototype.

最满意答案

原型函数意味着在类的对象上调用（就像OOP中的普通类）。 正常函数可以直接在类上调用（如OOP中的静态类）。

function Foo () { } //Should be called through Foo.SayHello() Foo.SayHello = function () { } /* Should be called on the object of Foo var MyObject = new Foo(); MyObject.SayHello(); */ Foo.prototype.SayHello = function () { }

Prototype functions are meant to be called on an object of class (like a normal class in OOPs). Where as normal functions can be called directly on the class (like a static class in OOPs).

function Foo () { } //Should be called through Foo.SayHello() Foo.SayHello = function () { } /* Should be called on the object of Foo var MyObject = new Foo(); MyObject.SayHello(); */ Foo.prototype.SayHello = function () { }