what in javascript

The properties and attributes in JavaScript are two completely different concepts, and I'll take a closer look at the properties and features in JavaScript, based on what I've learned.The main contents are as follows: Understand the nature

scoped chains and closures in JavaScript2012-06-29 11:41 1878 people read reviews ($) Collection report There is a concept in JavaScript that has not been learned before--closures. What is closure? The enclosing package, which is understood from

Name space Note: Haven't written for a long time, today I wrote a copy of the article in the company intranet, out of the show, just turned to web development, so began to learn javascript! Before introducing namespaces, a problem for developers is

How to randomly display background images in javascript, and randomly display in javascript This example describes how to randomly display background images in javascript. Share it with you for your reference. The details are as follows: Add the

Describes how to handle exceptions in JavaScript and how to handle exceptions in javascript. There are three types of programming errors: (1) syntax errors and (2) runtime errors (3) logic errors:Syntax error: Syntax errors, also known as parsing

Detailed analysis of four methods for creating objects in Javascript and four methods for creating objects in javascript Preface There are many ways to create objects using Javascript. Now let's list the four methods, and list the advantages and

Object-oriented in javascript and object-oriented in javascript I believe everyone is familiar with object-oriented writing in javascript. Do you still remember several ways to create objects? I believe that everyone except what they often write is

How to display the last modification date of the current document in JavaScript, and how to modify the date in javascript This example describes how to display the last modification date of the current document in JavaScript. Share it with you for

Compile a simple calculator in JavaScript and write it in javascript. This example describes how to compile the code of a simple calculator in JavaScript. Share it with you for your reference. The details are as follows:The running effect is as

This is a special keyword in JavaScript. It is widely used, and its flexibility makes it powerful, but it is doomed to be difficult to use at the same time. I was dizzy when I first started learning it. I checked a lot of information in order to

Basic types and reference types There are two types of data type values in JavaScript. The base type value and the reference type value. A primitive type value refers to a simple data segment, whereas a reference type value refers to an object

Javascript is just a scripting language, but it is also a programming language that we need to learn. The following is a reprinted article about common programming knowledge in javascript. 1. null and undefined * Get an attribute from an object. If

As one of the core technologies of JavaScript, function has a clear understanding of function mechanisms and usage, which is very important for Javascript development. Today, I will introduce some simple usage of functions in Javascript based on

The question about alert in JavaScript scripts I mentioned in [Thinking About alert in JavaScript scripts] has also been answered by everyone. In fact, from a certain point of view, this is not worth mentioning. However, I have raised this question

Overview Functions are the basis for modular program design. To compile complex Ajax applications, you must have a deeper understanding of functions. Functions in JavaScript are different from other languages. Each function is maintained and run as

This article details the methods and principles of various function calls in Javascript, which is helpful for understanding JavaScript Functions! JavaScript: five methods to call Functions Again and again, I found that Javascript code with bugs is

The magic of this in Javascript, javascriptthis This in Javascript is a completely different mechanism from other languages and may confuse engineers who write other languages. 1. mistakenly think this points to the function itself According to the

Understanding the implementation mechanism of Classes In JavaScript, you can use the function keyword to define a "class" and how to add members to the class. All variables or methods referenced by this pointer in a function become members of

Overview The implementation of scopes and contexts in JavaScript is a unique feature of the JavaScript language and, to some extent, the JavaScript language is very flexible. Functions in JavaScript can take a variety of contexts, and scopes can be

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,