Understanding jquery event bubbling _ jquery

This article mainly introduces jquery event bubbling and how to prevent jQuery event bubbling. For more information, see I. What is jquery event bubbling?
Many textbooks or manuals may involve the concept of event bubbling. For veterans, this is of course the most basic concept, but it may be unfamiliar to beginners or never heard of it. The following describes what event bubbles are based on code instances.
The code example is as follows:

 Event bubbling