The course mainly explains the basics of WEB front-end, from understanding the WEB front-end to installing and building the environment, and using WebStorm for development. This course comprehensively and systematically explains the basic knowledge and practical application techniques of HTML and CSS, and analyzes all aspects of web page production in a simple and in-depth manner through a large number of examples. Mainly covers HTML tags, CSS concepts and font settings, CSS selectors, CSS box models, CSS floats and clear floats, first introduction to javascript, operators, strings, objects and functions, etc.