在嵌套的 function 中傳遞父母 function arguments？

Question

I am having a problem with arguments object in a nested function, seems like arguments.length is taken from parent function while arguments[0] is taken from nested function... anybody can explain why this is happening?and show me the most effective將父 foo 的 arguments 傳遞給 bar 的方法？

$.fn.foo = function(color1, color2, time ){
    return this.each(function bar(){

        for(var i = 0;i < (arguments.length - 1);i++){
            alert(arguments.length); //this is taken from foo function and returns 2   
        alert(arguments[i]); //this is taken from  bar 

        }
    });
    };

Answer 1

arguments將始終（除非更改）具有當前執行的 function 的 scope ，在您的情況下是bar 。

閱讀 jquery .each文檔， function“原型”如下：

.each( function(index, Element) )

So of course arguments.length will return 2. Whether or not you have named variables to catch those 2 sent arguments is another story, but the arguments object will have length 2 if the function was called with 2 arguments.

Answer 2

簡單的解決方案：獲取對arguments的本地引用。

$.fn.foo = function(color1, color2, time ){
    var args = arguments; // Create a private reference
    return this.each(function bar(){
        alert(args.length); //Use private reference
    });
};