HTML language is the basic language for building web pages. As a web page production enthusiast or professional web designer, HTML language knowledge is indispensable. Based on practical experience and a large number of examples, the author of this book introduces the usage of various tags in the HTML language, the method of defining CSS styles, and the JavaScript language used in dynamic web pages. Each step of each operation process is explained in detail and equipped with appropriate graphics to facilitate readers to intuitively understand relevant knowledge points. At the same time, the knowledge points are also expanded so that readers can draw inferences from one example and apply them flexibly. The content introduced in this book is informative and practical, and the steps are explained in detail. It is suitable as a teaching material for various web design and production training schools. It can also be used for learning by ordinary web page production enthusiasts who want to make web pages better, as well as those who are engaged in website construction. Analyze and draw lessons from professionals in web design and production.