hangouts caller

This article as long as the use of the implicit parameters of JS (Arguments,callee,caller) is introduced, the need for friends can come to the reference, I hope to help youBefore referring to the above concepts, I would like to start by saying the implicit parameters of the functions in javascript:ArgumentsArguments the object represents the function being executed and the parameters of the function that called it. [function.] Arguments[n] ParameterFu

displayed, indicating that it is not an attribute of arguments, that is, arguments is not an array object. Caller Returns a reference to the function that calls the current function. FunctionName. caller The functionName object is the name of the executed function. Description For a function, the caller attribute is defined only when the function is executed. If

, arguments is not an array object.Here is a simple way to add a recommendation: Alert (arguments instanceof Array);Alert (arguments instanceof Object);CallerReturns a reference to the function that called the current function.Functionname.callerThe FunctionName object is the name of the function being executed.DescriptionFor a function, the caller property is defined only when the function executes. If the function is called by the top level, then

Caller Caller returns a reference to a function that calls the current function. Note that: 1. This attribute is only useful when a function is executed.2. If a function is called by the top layer in a javascript program, null is returned.FunctionName. caller: functionName is the currently executed function.Copy codeThe Code is as follows:Var a = function (){Aler

Differences between callee and caller in javascript: calleecaller Callee Callee is an attribute of an object. It is a pointer pointing to the function of the arguments object.First, we will write a level-1 function: function chen(x){if (x It can be seen from this function that the recursive function is used. If the function name is changed, the function name in it will also change. This is inconvenient, so we can use callee to try it. function chen(x)

not an array object. Caller Returns a reference to a function that calls the current function. Functionname.caller The FunctionName object is the name of the function being executed. Description For functions, the caller property is only defined when the function executes. If the function is called by the top level, then caller contains null. If you use the

the "undefined" is displayed, stating that the attribute is not arguments. That is, arguments is not an array object. Caller Returns a reference to a function that calls the current function. Functionname.caller The FunctionName object is the name of the function being executed. Description For functions, the caller property is only defined when the function executes. If the function is called by the top l

(Arguments.selfvalue);}Running the code you will find that the first alert shows 1, which means that the array object has the Selfvalue property, the value is 1, and when you call the function testaguments, you will find that "undefined" is displayed, stating that the property is not arguments. That is, arguments is not an array object.Second, callerReturns a reference to the function that called the current function.Functionname.callerThe FunctionName object is the name of the function being e

arguments, caller, callee, this is a special set of objects that are used in function. Apply () and call () are different ways of calling a function.ArgumentsCan be used to get the actual array of function-passing variables. This variable is particularly suitable for writing "polymorphism" functions, that is, you can do different things depending on the number of incoming arguments.Example One – Add function function sum () { var total = 0; for (

Today, the Baobao Steamed Stuffed Bun shows that QW. eventh. getevent in qwrap may generate an endless loop.CodeAs follows: /* ** Obtain the event object * @ method getevent * @ Param {event} event (optional) the event object is the event * @ Param {element} element (optional) of the host where the call location is located by default) event * @ return {event} event object of the host Where any element object is located */ Getevent: Function (Event, element ){ If (Event ){ Retur

CallerCaller is a property of a function object that refers to the caller of the function object, and returns NULL if the caller is the top-level caller.Cases:function func () { console.log (func.caller);} function obj () { func (); // The caller is the obj function }obj (); func () ; // The caller is a top-l