JS - use of arguments

When we are not sure how many parameters are passed , It can be used arguments To get , stay js in ,arguments In fact, it is a built-in object of the current function . Although there is a built-in function arguments The object of ,arguments Object stores all the arguments passed .

arguments The display form is a pseudo array , So you can traverse , Pseudo arrays have the following characteristics ：

have length attribute

Store data by index

Without array push,pop Other methods