What to learn before learning javascript

What should I learn before learning JavaScript?

JavaScript is a programming language widely used in web development and mobile application development. Before learning JavaScript, there are some basic computer science and programming concepts that need to be mastered, which are very important to master the JavaScript programming language. This article will introduce the basic concepts you need to master before learning JavaScript.

1. Basics of Programming

Before you start learning JavaScript, you need to understand the basics of programming, including data types, operators, flow control, functions, etc. These concepts are fundamental to any programming language and include algorithms, data structures, and basic computer science principles.

2. HTML and CSS

HTML is a markup language used to create the structure of Web pages. CSS is used to provide styles for web pages. Learning HTML and CSS can help you understand the structure and style of web pages, as well as how JavaScript works with HTML and CSS. Learn how to create HTML and CSS files and understand their role and role in web development.

3. DOM and BOM

DOM (Document Object Model) refers to the document object model, which defines the hierarchical structure of elements and their attributes in HTML documents. It is one of the important foundations of JavaScript programming, and developers can use JavaScript to modify and manipulate HTML elements.

BOM (Browser Object Model) refers to the browser object model, which allows access and modification of browser properties, such as window size, history, and browser version, through JavaScript.

Mastering the DOM and BOM will help you better understand how JavaScript interacts with web pages.

4. AJAX

AJAX (Asynchronous JavaScript and XML) refers to asynchronous JavaScript and XML. It allows web pages to update content without refreshing the page, which can improve the response speed of web applications. Understanding AJAX will give you a better understanding of how JavaScript is used to communicate with the server, as well as the interaction between the client and server during data requests and responses.

5. jQuery

jQuery is a popular JavaScript library with many useful functions and methods that simplify JavaScript programming. Before learning JavaScript, you can try learning jQuery and master its selectors, event handlers, and capabilities for manipulating DOM elements. Knowledge of jQuery will help you write JavaScript code quickly.

6. Database

If you plan to use JavaScript in web development, then you need to know something about databases. Databases are software systems that store data. They are used to store, search, and modify data. Understanding the basic functionality of databases and the SQL language will help you use JavaScript in web applications.

Summary:

Before learning JavaScript, in addition to basic programming knowledge, you also need to understand HTML and CSS, DOM and BOM, AJAX, jQuery and database knowledge. These basic concepts will provide you with the basic knowledge necessary to use JavaScript in web development and mobile app development. Only by understanding these concepts can we better understand the JavaScript programming language and applications.

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