Shangxuetang javascript video tutorial-JS Tutorial-php.cn

Home

Web Front-end

JS Tutorial

Shangxuetang javascript video tutorial

巴扎黑

Aug 24, 2017 pm 06:10 PM

javascriptjsTutorial

javascript! is a very powerful scripting language with a very wide range of applications. It is also necessary for every web developer to learn javascript well. "Shang Xuetang JavaScript Video Tutorial Season 1" explains in detail the various knowledge points of javascript. Key points include advanced function concepts, prototype concepts, interface concepts, single concepts, and a detailed explanation of JavaScript design patterns.

Shangxuetang javascript video tutorial

Video playback address: //m.sbmmt.com/course/503.html

The difficulty of this video is Object-oriented programming

One of the hallmarks of an object-oriented language is that it has the concept of a class, abstracts the public properties and methods of instance objects, and can create any number of instance objects based on classes. Generally, it has the functions of encapsulation, inheritance, multiple Characteristics of state! However, objects in JS are different from objects in pure object-oriented languages. The ECMA standard defines objects in JS: a collection of unordered attributes, whose attributes can include basic values, objects or functions. It can be simply understood that a JS object is a set of unordered values, in which the properties or methods have a name, and the mapped value can be accessed according to this name (the value can be a basic value/object/method).

1. Understanding the object:

The first one: Based on the Object object

var person = new Object();
person.name = &#39;My Name&#39;;
person.age = 18;
person.getName = function(){
    return this.name;
}

The second one: Object literal method (clearly searches for the properties and methods contained in the object )

var person = {
    name : &#39;My name&#39;,
    age : 18,
    getName : function(){
        return this.name;
    }
}

JS objects can use the '.' operator to dynamically expand their properties, and you can use the 'delete' operator or set the property value to 'undefined' to delete properties. As follows:

person.newAtt=’new Attr’;//添加属性
alert(person.newAtt);//new Attr
delete person.age;
alert(person.age);//undefined(删除属性后值为undefined);

The teacher who lectures in this video explains things in simple and easy-to-understand terms, with clear organization, layer-by-layer analysis, interlocking links, rigorous argumentation, and rigorous structure. He uses the logical power of thinking to attract students' attention, and uses reason to control the classroom teaching process. . When explaining, analyzing, and demonstrating, the thinking should be clear; when asking questions, discussing, and practicing, the students' psychological characteristics and receptive abilities should be taken into consideration according to the students' actual situation.

The above is the detailed content of Shangxuetang javascript video tutorial. For more information, please follow other related articles on the PHP Chinese website!

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

Python vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AM

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

From C/C to JavaScript: How It All WorksApr 14, 2025 am 12:05 AM

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

JavaScript Engines: Comparing ImplementationsApr 13, 2025 am 12:05 AM

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

Beyond the Browser: JavaScript in the Real WorldApr 12, 2025 am 12:06 AM

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

Building a Multi-Tenant SaaS Application with Next.js (Backend Integration)Apr 11, 2025 am 08:23 AM

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration)Apr 11, 2025 am 08:22 AM

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

JavaScript: Exploring the Versatility of a Web LanguageApr 11, 2025 am 12:01 AM

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

The Evolution of JavaScript: Current Trends and Future ProspectsApr 10, 2025 am 09:33 AM

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

See all articles