Prototype

Question

What does the code snippet to the right output by console.log?

Snippet

function Foo() { }
Foo.prototype.bar = 1
const a = new Foo()
console.log(a.bar)

Foo.prototype.bar = 2
const b = new Foo()
console.log(a.bar)
console.log(b.bar)

Foo.prototype = {bar: 3}
const c = new Foo()
console.log(a.bar)
console.log(b.bar)
console.log(c.bar)

Source

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