The article presents data on the study of the university's digital educational environment based on the survey of teaching staff of different ages. The digitalization of educational activities has initiated the processes of introducing various digital tools into the educational process. In particular, universities actively use free digital platforms, on the basis of which electronic information educational environment (EIEE) functions. The widespread introduction of modern educational tools requires teachers to actualize the classical didactic principles in the conditions of digital environment. The article investigates the problem of the classical didactic principles evolution and rules in the context of e-learning, understanding the content of these principles, as well as the peculiarities of student learning with the use of digital tools. The study shows that the majority of teachers, regardless of age and pedagogical experience, understand the peculiarities of digital tools in education, see the transformation of classical didactic principles in the digital environment and the peculiarities of student learning in these conditions. Most of the teachers also note the «clip» nature of modern students’ thinking, which is manifested in the cognitive, communicative and emotional spheres.