The book contains 20 illustrated lessons, 40 practical exercises on the topic of programming web scripts and more than 70 tasks for self-work. The basics of j & # 097; vascript are outlined: data and operators, expressions and control constructs, functions, classes, objects and arrays, debugging tools. Disclosed are mechanisms for managing web pages: events and their processing, element management, graphics and multimedia, web forms and controls, regular expressions, navigation and window management. Work with HTML API and component programming are considered: asynchronous programming, work with external data, software graphics, declaring their classes, creating components. The technologies of interaction with the server are highlighted: AJAX, PHP, development of frontends and backends, server messages.