Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Getting the First and Last Child

Peter Theroux
Peter Theroux
5,600 Points
Posted by Peter Theroux
Peter Theroux
5,600 Points

Button Problems

'up', 'down', and 'add item' buttons do not work. Commenting out the if statements on line 48 allows 'up' to work and likewise with line with 'down', but not at the same time. The console gives an error at line 78. Link to worksheet: https://w.trhou.se/86y59l9ml9

2 Answers

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

You just have a couple of typo/spelling errors:

  • on line 46 there is "previousElementsSibling" (with an extra "s") instead of "previousElementSibling"
  • on line 54 there is "nextElementsSibling" (also with an extra "s") instead of "nextElementSibling"