Determine whether the page is closed or refreshed js Code _ basic knowledge

The js code labels that determine whether the page is closed or refreshed are only the onload, onunload, and onbeforeunload events, but not the onclose event. The onunload Event is executed no matter whether the page is closed or refreshed. How can I capture and close the page?

Only onload is executed when the page is loaded.

When the page is closed, only onunload is executed.

When the page is refreshed, execute onbeforeunload first, then onunload, and finally onload. In this way, we can add a tag in onbeforeunload to judge the tag in onunload to determine whether the page is actually closed.



Determine whether the page is closed or refreshed