JavaScript's 8 falsy values: 0 -0 false NaN "" (empty string) null undefined...
JavaScript's 8 falsy values:
0
-0
false
NaN
"" (empty string)
null
undefined
document.all
Everything else is truthy.
#javascript
And for those curious about document.all: https://stackoverflow.com/questions/10350142/why-is-document-all-falsy