Linked Property href= "? ” ？ What and what are the pros and cons

1. <a onclick= "{jscode}" > is a very common way of JS use, often add a href= "# # #" That is <a onclick= "{jscode}" href= "# # #" >without <a href= "Javascript:{jscode}" > or <a href= "javascript:" > is to be compatible with multiple browsers to <a > Label interpretation and Handling.
2. <a href= "#" >#是有特定意义的, if there is content behind the #, it will be considered a label, the corresponding tag will be found when clicked, and will jump to the first page when it is not found. The page is not refreshed.
3. # # # #其实是 # and # #的组合, is a meaningless label, just a habit of writing, the principle "relies on the Web page error mechanism, can not be found to do not do".
4. <a href= "" > will re-refresh the page, back to the top of the page.

Linked Property href= "? ” ？ What and what are the pros and cons