javascript oops concepts

Basic concepts of JavaScript and basic concepts of javascript I. Case Sensitive All variables, function names, and operators in ECMAScript are case sensitive. For example, the variables test and Test indicate two different variables respectively, Ii. identifier The identifier refers to the name of a variable, func

Basic concepts of JavaScript (2) --- variables and basic concepts of javascriptVariable 1. variable definition Use var in Javascript to define variables. The specific format is as follows: Var name = 1; If only the variables are declared and the variables are not initialized, the value of the variable is undefined. (Fo

If the browser does not support scripting or browser support scripts but the script is disabled, the browser will display the contents of If the browser supports scripting, it does not display the text in the NoScript element. A browser that does not recognize 3. Basic Concepts Each language is similar. Strict mode : ECMAScript introduces the concept of strict mode, to enable strict mode throughout the script, you need to add at

[JavaScript.6] Summary of phase concepts: HTML + CSS + JavaScript + xml + xpath + Json + Ajax[Preface] Recently I learned a lot about BS new things, including many new names, concepts, and misunderstandings. Today, let's take a look at what we learned. A conceptual summary. This article is mostly a conceptual personal

Several concepts related to javascript events: javascript events The client javascript program adopts the asynchronous event-driven programming model. Concepts of related events: 　　Event type ):String used to indicate the type of event; 　　Event target ):Event object; 　　Event

In-depth analysis of object concepts in JavaScript programming, in-depth analysis of javascript Everything in JavaScript is an object: String, value, array, function...In addition, JavaScript allows custom objects.All things are objectsJavaScript provides multiple built-in o

Basic concepts of JavaScript (iv) --- operators and javascript OperatorsOperator 1. unary operator The operator that can operate only one value is called The unary operator. The unary operator includes the increment (decrement) operator and the unary plus (decrement) operator. The increment/decrease operator is divided into the increment/decrease operator and the

This article mainly introduces several confusing concepts in javascript, which are common problems. We recommend this article to you. If you need it, refer to it. 1. var name = "The Window";var object = {name : "My Object",getName: function(){return this.name;}}; Here, the getName () method simply returns the value of this. name. The following are several methods to call object. getName ():Methods and t

Understanding of JavaScript scopes and block-level scopes, and understanding of javascript concepts Scope is always the top priority of any programming language, because it controls the visibility and lifecycle of variables and parameters. Here, we first understand two concepts: block-level scope and function scope. Wh

. undefined . Ecmas function parameters of Cript: Key The named parameters are only convenient, but not necessary. The parser does not validate the named parameters.the parameters in the ECMAScript are represented internally by an array. The ability to access This array of parameters through the arguments object, so that each participant can be interviewed. Changes to the values in the arguments object are self-reflective to the corresponding named parameters. However, changing the name of t

Read chapter 4th and chapter 7 of JavaScript advanced programming. 1. Basic Concepts 1. What is the execution environment? (Execution context) The execution environment defines other data that variables or functions have the right to access and determines their respective actions. Personal perception: The so-called execution environment refers to a special code (such as a function) That is executed in this

This article will focus on the basic concepts in JavaScript. These concepts are quite different from those in traditional languages. Therefore, we will list a separate chapter for specific descriptions to understand the concepts of this chapter and the concepts of subsequent

Web development is more of a bother, need to master a lot of things, especially in front-end development of friends, need to pass 10 lines. Today, this article introduces beginners to some basic concepts and techniques used in web development, from A to Z a total of 26 items, each corresponding to a concept or technology.A-ajaxAJAX is all called "asynchronous JavaScript and XML" (Asynchronous

Four JavaScript concepts that Node. js developers must be familiarFour JavaScript concepts that Node. js developers must be familiar Node. js is a server-side development framework built based on Google Chrome's V8 JavaScript Engine. Although Node. js itself is developed usi

This chapter describes the data types (Basic Types and reference types), variables (including the scope of variables), and operators (mainly common, but not operators that can be understood literally ). Because "Everything is an object" in JavaScript, after understanding these basic concepts, readers can easily understand such as scope, calling objects, and closures, currying and so on.Data TypeReaders who

This chapter focuses on data types (basic types and reference types) in JavaScript, variables (including the scope of variables), operators (primarily some of the more common but not easily understood operators). Because of the "all objects" in JavaScript, after mastering these basic concepts, readers can easily understand co