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Created September 16, 2015 04:16
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How do I get `this.foo` to be assigned to class B's prototype instead of class A's prototype?
Raw
foo.js
/*
How do I get `this.foo` to be assigned to class B's prototype instead of class A's prototype?
*/
class A {
constructor(options = {}) {
this.foo = options.foo
}
}
class B extends A {
constructor(options = {}) {
super(options)
}
}
@pmuellr
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pmuellr commented Sep 16, 2015

It's not on any prototypes. this.foo is the foo property of an A or B object, whichever you constructed. Obvious for the new A() that it grows a new property, but also when you new B(), the B's ctor super calls into A's ctor - with the B object as this - and so sets the foo property on the B object.

You're generally not going to be futzing with the prototypes once you have live objects, eg "assigning to prototypes".

What's the problem you're seeing?

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