JS Truth table

Source: Internet
Author: User

= = Comparison (value comparison)

Null

‘‘

0

' 0 '

Undefined

NaN

False

[]

{}

Null

t

F

F

F

t

F

F

F

F

"

F

t

t

F

F

t

t

F

0

F

t

Span style= "COLOR: #ff0000" >t

t

F

F

t

t

F

' 0 '

F

F

t

t

F

F

t

F

F

Undefined

T

F

F

F

T

F

F

F

F

NaN

F

F

F

F

F

F

F

F

F

false

F

t

t

t

F

F

t

t

F

[]

F

t

t

F

F

t

F

F

{}

F

F

F

F

F

F

F

F

F

! Non-judgmental

Null

‘‘

0

' 0 '

Undefined

NaN

False

[]

{}

T

T

T

F

T

T

T

F

F

If judgment

null

"

0

' 0 '

undefined

NaN

false

[]

{}

f

F

F

t

F

F

F

t

t

= = = Comparison (value comparison && type comparison)

Null

‘‘

0

' 0 '

Undefined

NaN

False

[]

{}

Null

t

 

 

 

 

 

 

 

 

"

 

t

 

 ",

 

 

 

 ,

0

 

t

 

 

 

 

 

 

' 0 '

 

 

Span style= "COLOR: #ff0000" >t

 

 

 

 

 

undefined

 

 

Span style= "COLOR: #ff0000" > 

t

 

 

 

 

NaN

 

 

Span style= "COLOR: #ff0000" > 

f

 

 

 

false

 

 

Span style= "COLOR: #ff0000" > 

 

t

 

 

[]

 

 

 

 

 

 

 

f

 

{}

F

typeof

Null

‘‘

0

' 0 '

Undefined

NaN

False

[]

{}

Object

String

Number

String

Undefined

Number

Boolean

Object

Object

JS Truth table

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