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demisx/javascript-falsy-vs-truthy.md

Created April 26, 2014 03:53
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JavaScript Falsy vs. Truthy
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javascript-falsy-vs-truthy.md

The following values are always falsy:

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

All other values are truthy, including "0" (zero in quotes), "false" (false in quotes), empty functions, empty arrays, and empty objects.

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