What basics are needed to learn javascript

In recent years, front-end technology has gradually become an indispensable part of the Internet industry. As one of the core front-end technologies, JavaScript has attracted even more attention. What basics do beginners need to master when learning JavaScript? This article will introduce it to you in detail.

1. HTML and CSS Basics

JavaScript is a scripting language used to add interactive effects to web pages. But before writing JavaScript programs, you must master the basics of HTML and CSS. HTML is a markup language used to create the structure of web pages, while CSS is used to control the appearance and style of web pages. Without the basics of HTML and CSS, it will be difficult to understand and operate JavaScript.

2. Programming Language Basics

JavaScript is a programming language, so you need to have basic knowledge of computer programming. Mastering a programming language can improve the efficiency and accuracy of learning JavaScript. Beginners can start by learning some simple and easy-to-understand programming languages, such as Python or Ruby. These programming languages can help you understand programs and algorithms faster, allowing you to better master JavaScript.

3. Data structures and algorithms

Data structures and algorithms are the core knowledge of computer science. When learning JavaScript, having this knowledge can help you better solve real-world problems, especially when dealing with large amounts of data. Data structures and algorithms can not only improve program design capabilities, but also help you better understand the execution process of JavaScript.

4. DOM and BOM

DOM (Document Object Model) defines the object hierarchy of HTML, XML and SVG documents, allowing you to use scripting languages such as JavaScript To manipulate the content and structure of HTML documents. BOM (Browser Object Model) defines the objects and methods of browser windows, text boxes, buttons and other elements. Therefore, when learning JavaScript, it is very important to understand the DOM and BOM. By mastering the DOM and BOM, you can create dynamic pages and features that improve user experience.

5. Asynchronous Programming

JavaScript is often used to write applications that involve network or I/O operations. These operations may require waiting for data to arrive or handling computationally time-consuming tasks. In this case, asynchronous programming should be used. Asynchronous programming solves the problem of program waiting through mechanisms such as callback functions or Promise. When learning asynchronous programming, you need to master callback functions, Promise, async/await and other technologies.

6. Libraries and Frameworks

The JavaScript ecosystem is very rich, with a large number of excellent libraries and frameworks. Learning these libraries and frameworks can greatly improve development efficiency. Certain libraries and frameworks also allow you to focus more on implementing your business logic rather than writing code from scratch. For beginners, it is important to understand and learn some basic libraries and frameworks, such as jQuery, React, and Vue, etc.

These basics are very important when learning JavaScript. In addition, you also need to have patience and perseverance to learn and try, to constantly solve problems and improve skills. Only in this way can we truly master JavaScript technology and become an excellent front-end engineer.

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