here's what I made 

there if you click the items on the list, they are cloned and showed up at the bookmark page

the problems are

1. local storage doesn't work

    If I refresh the page, the bookmarked pages are gone. 

   

2. After I bookmark one item in the list,  if I click that one again, it show up again at the bookmark page.

   I don't want to store same pages. 

3. I want to limit list numbers 'only' in the bookmark page.

help me.