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
Greg Kaleka
39,021 PointsReact.js required string - bug or am I doing something wrong?
I kinda think I'm right, but it's entirely possible I'm doing something wrong. Is it the trailing comma that's throwing the challenge for a loop?
2 Answers
Dale Severude
Full Stack JavaScript Techdegree Graduate 71,350 PointsYes, drop the comma and the challenge will pass. The last key-value pair shouldn't have a comma, but if there are any previous key value pairs, they do require a comma.
Dale Severude
Full Stack JavaScript Techdegree Graduate 71,350 PointsAh yes, this is a bug. I was thinking this was JSON data, which is probably a common mistake.
Greg Kaleka
39,021 PointsGreg Kaleka
39,021 PointsThanks Dale. I did get it to pass by removing the comma.
In modern js, it's actually a best practice to have a trailing comma. This is similar to other languages like Python. It makes things go more smoothly if you need to add, delete, or re-arrange the elements in an object, array, etc.
If you watch the videos, you'll see that Jim follows this best practice without fail. I'm going to go ahead and report the bug.