In web browsers, what's the difference between onblur and onfocusout?

Question

If they\'re the same, then why there are two of this kind of event?

Answer 1

There's essentially no difference in 2017:

https://www.quirksmode.org/js/events_order.html

Few web developers consciously use event capturing or bubbling. In Web pages as they are made today, it is simply not necessary to let a bubbling event be handled by several different event handlers. Users might get confused by several things happening after one mouse click, and usually you want to keep your event handling scripts separated.