JavaScript Study Notes: Function Object_Basic Knowledge

In JavaScript, functions are objects.

There is no method overloading in JS

In JavaScript, there is no concept of method (function) overloading.

Example:

Copy code The code is as follows:

        
                                                                                                                                                                                                                                       
   
       
   

　　每一个函数对象都有一个length属性，表示该函数期望接收的参数格式。

　　它与函数的arguments不同，arguments.length表示函数实际接收的参数个数。

　　例子:

复制代码 代码如下: