Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
Monroe Gollaher7,301 Points
Color not changing and "app.js:4 Uncaught TypeError: Cannot read property 'style' of undefined at app.js:4"
Hi, for some reason my code for changing the li items to purple is working great. But when trying to change the "error-not-purple" class to red, it won't work. And the only error the console gives me tells me to reference line 4, which I know is working.
Any help would be greatly appreciated! Link to workspace: https://w.trhou.se/4fl8mngpgr
Steven Parker220,415 Points
When you construct a "for" loop to go through an iterable, the index values should go up to but not including the length of the iterable. That's because index numbers begin at 0 instead of 1.
So the conditional clauses of the "for" loops should use the "<" operator instead of "<=".