[amitport]

I'm not sure what improvments are you suggesting.

We are talking about runtime class creation with dynamic methods, while still adding proper static types. There aren't many language allow this level of flexibility.

You can probably disallow prototype use with existing tools if that's desired, but it is an advanced tool for advanced use cases (which still exist).

[randomdata]

We are talking about how poor syntax pushes developers into some strange corners to avoid having to deal with the poor syntax. class ultimately gets you to a decent place, but forces the code into one big giant mess that nobody wants to look at ever again. Prototype function assignment gets you to the same place, with better syntax, but falls short for other reasons.

Given:

    class Foo {
        constructor(x) {
            this.x = x
        }

        bar() {
            return this.x
        }
    }

maybe it becomes:

    object Foo(x) {
        this.x = x
    }

    function Foo.bar() {
        return this.x
    }