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Caller: Functionname.caller returns the caller. Take a look at the following function, you can copy it to vs under Execute Copy Code code as follows: function caller () { if (Caller.caller) { Alert (caller.caller.toString ()); } else { Alert ("Function direct execution"); } } function Handlecaller () {
1. Caller attributesReturns a reference to the function, that is, the function body that calls the current function.Functionname. Caller: the name of the function to be executed.Note:For a function, the caller attribute is defined only when the function is executed. If the function is called by the top layer of the JScript program,
JS call method _ apply method _ caller attribute _ callee attribute Address: http://aweber.blogbus.com/logs/46751586.html I. 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 Code Call ([thisobj [, arg1 [,Arg2 [,[,. Argn]) ParametersThisobjOptional. Will be used as th
Today, I will introduce the call attributes of a function through an example.Example:Function whocallme (){Alert ("My caller is" + whocallme. Caller );};Function callera () {whocallme ();};Function callerb () {whocallme ():};Alert {whocallme. Caller}; // The output result is: NULL;Whocallme (); // The output result is: My cal
, and when you call the function testaguments, you will find that "undefined" is displayed, indicating that the property is not arguments. That is, arguments is not an array 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 cal
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
"undefined" is displayed, stating that the attribute is not arguments. That is, arguments is not an array object. Here is a simple way to add the recommended: alert (arguments instanceof Array); Alert (arguments instanceof Object); Caller Returns a reference to a function that calls the current function.Functionname.callerThe FunctionName object is the name of the function being executed. DescriptionFor functions, the
Some friends may ask caller, What Is callee? What is the role of javascript? So this article will give some basic introduction to this. It is expected to help you understand callee and caller in javascript. 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 fu
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, caller contains null. If the caller attribute is used in the string context, the result is the same as functionName. toString, that is,
function, the caller attribute is defined only when the function is executed. If the function is called by the top layer, caller contains null. If the caller attribute is used in the string context, the result is the same as functionname. tostring, that is, the decompilation Text of the function is displayed.The following example illustrates the usage of
is not an array object. CallerReturns 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, caller contains null. If the caller attribut
is, arguments is not an array object.CallerReturns 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, caller contains null. If the caller
myfunc=function (x, y) {var a= "MyFunc";alert (THIS.A);Alert (x + y);}Myfunc.call (func, "var", "fun");//"Func" "var fun"Myfunc.apply (func,["var", "Fun"]);//"Func" "var fun"Third, caller propertiesReturns a reference to a function that invokes the function body of the current function.The FunctionName.caller:functionName object is the name of the function being executed.DescriptionFor a function, the caller
Directory Introduction Generation example Conclusion Other resources This article is the second part of a series of articles describing how to use Business Connectivity Services to create and implement declarative Web Services (four parts in total ). WCF: Build a WCF Web Service for SharePoint 2010 Business Connectivity Services (part 1, part 4) WCF: determine the identity of the caller in the WCF Web Service (part 1, Part 4 in total) (this
1:caller returns a reference to a call to the current function returns null if it is called by the top level(For a Li Ziha caller to call you, who called you, and who calls you, obviously, the following is the execution of a function. Only when you call, do you know who the caller is, so for a function only caller exis
is not arguments. That is, 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
1:caller returns a reference to a call to the current function returns null if it is called by the top level(For a Li Ziha caller to call you, who called you, and who calls you, obviously, the following is the execution of a function. Only when you call, do you know who the caller is, so for a function only caller exis
that the property is not arguments. That is, arguments is not an array object.CallerReturns a reference to the function that called the current function. M.mlyrx120.comFunctionname.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 contains
necessary to note that the JavaScript function does not check the type and number of parametersArguments Property callee (JavaScript 1.2 new property)The callee property of the actual parameter object references the function that is currently executing. This is useful when the unnamed function calls itself recursively(function(x) {// to find the factorial if of x (typeof x = = "number" x >0 { return x * Arguments.callee (x-1); } return 1; // when x equals 0 o'clock Output 1})
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
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