js arguments,jcallee caller usage summary_javascript skills-JS Tutorial-php.cn

Home

Web Front-end

JS Tutorial

js arguments,jcallee caller usage summary_javascript skills

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 05:11 PM

Keywords: arguments, callee, caller
arguments: Represents the parameters passed into the function
callee: Represents the statement of the function and the function body
caller: Represents the function that calls the function

arguments

This object represents the function being executed and the parameters of the function that calls it.

caller

Returns a reference to the function that called the current function.
functionName.caller
functionName object is the name of the function being executed.

Explanation
For functions, the caller attribute is only defined when the function is executed. If the function is called from the top level, caller contains null . If the caller attribute is used in a string context, the result is the same as functionName.toString, that is, the decompiled text of the function is displayed.

callee

Returns the Function object being executed, which is the body of the specified Function object.

[function.]arguments.callee

The optional function parameter is the name of the Function object currently being executed.

Description

The initial value of the callee attribute is the Function object being executed.

The callee attribute is a member of the arguments object. It represents a reference to the function object itself, which is beneficial to the recursion of anonymous functions or to ensure the encapsulation of functions. For example, the following example recursively calculates the sum of natural numbers from 1 to n. This property is only available when the relevant function is executing. It should also be noted that callee has a length attribute, which is sometimes better for verification. arguments.length is the actual parameter length, and arguments.callee.length is the formal parameter length. From this, you can determine whether the formal parameter length is consistent with the actual parameter length when calling.

Copy code The code is as follows:

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Replace String Characters in JavaScriptMar 11, 2025 am 12:07 AM

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

8 Stunning jQuery Page Layout PluginsMar 06, 2025 am 12:48 AM

Leverage jQuery for Effortless Web Page Layouts: 8 Essential Plugins jQuery simplifies web page layout significantly. This article highlights eight powerful jQuery plugins that streamline the process, particularly useful for manual website creation

Build Your Own AJAX Web ApplicationsMar 09, 2025 am 12:11 AM

So here you are, ready to learn all about this thing called AJAX. But, what exactly is it? The term AJAX refers to a loose grouping of technologies that are used to create dynamic, interactive web content. The term AJAX, originally coined by Jesse J

10 jQuery Fun and Games PluginsMar 08, 2025 am 12:42 AM

10 fun jQuery game plugins to make your website more attractive and enhance user stickiness! While Flash is still the best software for developing casual web games, jQuery can also create surprising effects, and while not comparable to pure action Flash games, in some cases you can also have unexpected fun in your browser. jQuery tic toe game The "Hello world" of game programming now has a jQuery version. Source code jQuery Crazy Word Composition Game This is a fill-in-the-blank game, and it can produce some weird results due to not knowing the context of the word. Source code jQuery mine sweeping game

How do I create and publish my own JavaScript libraries?Mar 18, 2025 pm 03:12 PM

Article discusses creating, publishing, and maintaining JavaScript libraries, focusing on planning, development, testing, documentation, and promotion strategies.

Load Box Content Dynamically using AJAXMar 06, 2025 am 01:07 AM

This tutorial demonstrates creating dynamic page boxes loaded via AJAX, enabling instant refresh without full page reloads. It leverages jQuery and JavaScript. Think of it as a custom Facebook-style content box loader. Key Concepts: AJAX and jQuery

jQuery Parallax Tutorial - Animated Header BackgroundMar 08, 2025 am 12:39 AM

This tutorial demonstrates how to create a captivating parallax background effect using jQuery. We'll build a header banner with layered images that create a stunning visual depth. The updated plugin works with jQuery 1.6.4 and later. Download the

How to Write a Cookie-less Session Library for JavaScriptMar 06, 2025 am 01:18 AM

This JavaScript library leverages the window.name property to manage session data without relying on cookies. It offers a robust solution for storing and retrieving session variables across browsers. The library provides three core methods: Session

See all articles