Introduction to basic knowledge of DOM operations

How to get element based on id attribute?

How to get an element based on its name attribute?

How to get element based on tag name?

Name attribute and tag name shortcut to get elements

How to get elements through class attribute?

How to get elements through css selector?

How to traverse the document tree through DOM methods?

How to manipulate attributes of HTML elements?

How to deal with content in HTML elements?

DOM node creation/insertion/deletion/update operations

Practical warm-up: Principle of generating chat messages

Practical combat: Simulating intelligent online customer service system (1)

Practical combat: Simulating intelligent online customer service system (2)