Event bubble usage example of event object e in jQuery _ jquery

This article mainly introduces the event bubble usage of event object e in jQuery. If you need it, you can refer to the previous manual without seeing the concept of event object, what I want to achieve at that time is to click a text box to display a drop-down multiple selection box. The loss of focus in the text box triggers the blur event to hide the drop-down box. But when I want to select multiple selection boxes, it will also hide it, so I cannot choose it, which makes me very depressed. I checked the information for a day and finally got rid of the focus. I found an event bubbling on the Internet and found that this feature can be implemented by clicking.

E. stopPropagation () prevents event bubbles

The Code is as follows: