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 AngularJS An Introduction to Two-Way Data Binding Looking at ng-model: Part 1

Posted by Josiah McClellan
Josiah McClellan
Courses Plus Student 7,869 Points

falsey javascript values

At 2:01 in this video, instructor says "truthy means anything other than zero, false, null or unidentified."

I believe he meant "zero, false, null, undefined, an empty string, or NaN".

1 Answer

geoffrey
geoffrey
28,736 Points
geoffrey
geoffrey
28,736 Points

Indeed here are the values that are falsey

falsey:

  • false
  • 0 (zero)
  • 0.0
  • "" (empty string)
  • null
  • undefined
  • NaN (a special Number value meaning Not-a-Number!)