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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Solution: Using nextElementSibling

Posted by Carlos Mera
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Carlos Mera
Front End Web Development Techdegree Graduate 13,460 Points

Is my solution to the problem ok?

I came up with a different solution to this problem, it seems to be working great regardless of the number of 'li' elements and I didn't have to use a second 'if' statement. Would this be ok? Thanks!!

if (event.target.className == 'down') { let li = event.target.parentNode; let nextLi = li.nextElementSibling.nextElementSibling; let ul = li.parentNode; ul.insertBefore(li, nextLi); }

John Johnson
John Johnson
11,790 Points

The if statements are used to check "Is there another element before this one?" If yes, then perform the move, if not, do nothing.

I imagine in your version, pressing the up button on the top li element will move it to the bottom of the list.

1 Answer

M C
M C
12,105 Points
M C
M C
12,105 Points

As far as I see clicking the last 'down' button will throw a error in the console. As there is no check to see if the 'li' exists.

Now if you add a check to prevent that error, your 'down' feature won`t work for the button before the last one as li.nextElementSibling.nextElementSibling; will return null.