For every JavaScript learner must know.

Question

JavaScript truth table:

' ' == '0' // false

0 == ' ' // true

0 == '0' // true

false == 'false' // false

false == '0' // true

false == undefined // false
Source: Doug Crockford

Answer 1

Thanks!

typeof(NaN) == 'number'
typeof(null) == 'object'
typeof(document.all) == 'undefined'

Answer 2

Remaining:

false == null //false
null == undefined //true
" \t\r\n" == 0 //true

Answer 3

Thanks for this @Ram

Answer 4

That's crazy!

Answer 5

thanks for Give it to us

Answer 6

false == 'false' //false because false IS a boolean and falsz à string. false == 0 && false == false //true