javascript optional arguments

]);} Argumentstest (1,2,3,4);Popup Result: The result of the popup is 4. Here is the callee method, which returns the function object that is being executed.function Argumentstest (A, b) { //alert (typeof arguments); alert (arguments.length); Alert (arguments[1]); alert (Arguments.callee); alert (arguments.callee.length);} Argumentstest (1,2,3,4);Popup Result: The following is the key, argume

What is argumentsarguments It's a built-in object in JavaScript, it's weird and often overlooked, but it's really important. All major JS libraries take advantage of the arguments object. So agruments objects are necessary for JavaScript programmers to be familiar with. All functions have a arguments object of their ow

In-depth analysis of arguments objects in JavaScript (strongly recommended) and javascriptarguments 1. In JavaScript, the arguments object is a special object, which is actually a built-in attribute of the current function. Arguments is very similar to Array, but it is not a

One, what is argumentsArguments is a built-in object in JavaScript, it's quirky and often overlooked, but it's really important. All the major JS libraries use the arguments object. So agruments objects must be familiar to JavaScript programmers.All functions have a arguments object of their own, which includes the par

Example of JavaScript arguments object application Arguments object In function code, the special object arguments can be accessed without explicitly specifying the parameter names. For example, in the sayHi () function, the first parameter is message. You can also access this value using

1. In JavaScript, the arguments object is a more specific object, which is actually a built-in property of the current function. Arguments is very similar to an array, but is not actually an array instance. Can be confirmed by the following code (of course, in the function Funcarg, the call arguments is not necessarily

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 sto

of the arguments will replace the places in turn. For example: Format ("and the '%1 want to know whose%2", "Papers", "shirt", "wear"); the script above will return "And the papers want to know whose shirt you wear". The point to note here is that even in the definition of the Format function, we define only a parameter named string. Javascript, regardless of the number of parameters defined by the functi

1. In JavaScript, the arguments object is a more specific object, which is actually a built-in property of the current function. Arguments is very similar to an array, but is not actually an array instance. Can be confirmed by the following code (of course, in the function Funcarg, the call arguments is not necessarily

1. In JavaScript, the arguments object is a very special object and is actually a built-in property of the current function. Arguments is very similar to array, but is not actually an array instance. Can be confirmed by the following code (of course, in fact, in the function funcarg, call arguments is not necessary to

: Format ("and the % 1 want to know whose % 2 you % 3", "papers", "shirt", "Wear"); The above script will return "And the papers want to know whose shirt you wear ". Note that, even in the format function definition, we only define a parameter named string. Javascript, regardless of the number of parameters defined by the function, allows us to pass any number of parameters to a function and save these parameter values to the

the % 1 want to know whose % 2 you % 3", "papers", "shirt", "wear"); the above script will return"And the papers want to know whose shirt you wear ". Note that, even in the format function definition, we only define a parameter named string. Javascript, regardless of the number of parameters defined by the function, allows us to pass any number of parameters to a function and save these parameter values to the ar