October 2002
Intermediate to advanced
136 pages
2h 44m
English
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Name
Boolean
Constructor
new Boolean(value) Boolean(value)
Invoked as a function, without the new operator, Boolean( ) converts
value to a boolean value (not a Boolean
object) and returns it. All values convert to true except for 0, NaN, null, undefined, and the empty string, “”. When
invoked with the new operator, the
Boolean( ) constructor performs the
same conversion and wraps the result in a Boolean object.
Methods
toString( )Returns “true” or “false”, depending on the value of the Boolean object.
valueOf( )Returns the primitive boolean value wrapped by the Boolean object.
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