HTML Knowledge points

1.
a href = "" is opened by default or the current page, it will be refreshed and reopened.
a href = "#" The URL of the browser address bar will display more than 1 #. Does not refresh the page and will return to the top of the page
A href= "#" How does this work in HTML?
Jump to the top of this page, general recommendations written in javascript:void (0); better, a little bit of a reaction, write # I'll jump.

HTML Knowledge points