caller ld

the selfvalue attribute and the value is 1. When you call the testAguments function, "undefined" is displayed, indicating that it is not an attribute of arguments, that is, arguments is not an array object. The following is a simple method recommended for attaching: The Code is as follows: Alert (arguments instanceof Array );Alert (arguments instanceof Object ); Caller Returns a reference to the function that calls the current function. Functi

This article provides a detailed description of the usage of arguments, caller, callee, and apply in js. If you need them, refer to them, I hope it will be helpful for you to refer to the implicit parameter arguments of functions in javascript before referring to the above concepts. Arguments This object represents the function being executed and the parameters of the function that calls it. [Function.] arguments [n]Parameter function: option. Name o

properties:// Usage of the arguments object.Function ArgTest (a, B ){Var I, s = "The ArgTest function expected ";Var numargs = arguments. length; // obtain the value of the passed parameter. (Real parameter)Var expargs = ArgTest. length; // obtain the value of the expected parameter. (Row parameter)If (expargs S + = expargs + "argument .";ElseS + = expargs + "arguments .";If (numargs S + = numargs + "was passed .";ElseS + = numargs + "were passed .";S + = "\ n"For (I = 0; I S + = "Arg" + I + "=

Js apply/call/caller/callee/bind usage and Difference AnalysisI. call MethodCall a method of an object to replace the current object with another object (in fact, it is to change the internal pointer of the object, that is, to change the content pointed to by this object ).Js CodeCall ([thisObj [, arg1 [, arg2 [, [,. argN])ParametersThisObjOptional. Will be used as the object of the current object.Arg1, arg2, and argNOptional. The method parameter seq

What are arguments, caller, and callee in javascript? What is the role of javascript? This article will give a basic introduction to this. I hope you will like it. What is arguments? When calling a function, arguments creates a similar array but not an array object, and stores the parameters actually passed to the function, it is not limited to the parameter list of function declaration. What does Nima mean? Write a demo. See the code below. A

simple method: Alert (arguments instanceof array );Alert (arguments instanceof object ); Caller Returns a reference to the function that calls the current function.Functionname. CallerThe functionname object is the name of the executed function.DescriptionFor a function, the caller attribute is defined only when the function is executed. If the function is called by the top layer,

arguments, that is, arguments is not an array object.The following is a simple method recommended for attaching:Copy codeThe Code is as follows:Alert (arguments instanceof Array );Alert (arguments instanceof Object ); Caller Returns a reference to the function that calls the current function.FunctionName. callerThe functionName object is the name of the executed function.DescriptionFor a function, the caller