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
Why don't we use "const" or "let" in place of "var" in some of these projects? Specifically - the Lightbox project.
Steven Parker228,978 Points
You can substitute "const" or "let" for "var" in other projects as long as you're mindful of the differences in scope and how they may pertain to the situation. But for the most part, it won't be pertinent to the concepts being taught.