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AI solution for JavaScript Quiz on BFE.dev
58. inherit getter setter
The code outputs the following:
0
1
0
2
2
Explanation:
- The code defines two classes
A
andB
that extendA
, and defines another classC
that also extendsA
but overrides thefoo
getter of its prototype. A
defines a getter and setter for a property calledfoo
that simply sets or gets the value of a global variableval
.B
does not override thefoo
getter or setter of its prototype, so it inherits them fromA
. Whenb.foo
is accessed, it returns the current value ofval
, which is initially set to 0. Whenb.foo
is set to 1, it updates the value ofval
to 1.C
overrides thefoo
getter of its prototype to always return the current value ofval
, regardless of its input. Whenc.foo
is accessed, it also returns the initial value ofval
(0).- When
c.foo
is set to 2, it does not update the value ofval
in the prototype, but creates a new propertyfoo
on the instancec
that shadows the prototype property. Therefore, whenc.foo
is accessed again, it returns the shadowed value of 2, whileb.foo
still returns the current value ofval
(2) in the prototype.