Typescript parent class/child class interaction and precedence

typescript-inheritance.ts

abstract class A {
    p: string = 'A.p';
    q: string;
    r: string;
    s = 'A.s'

    c: C;

    constructor(dto: any) {
        console.log('A.constructor')
        this.q = 'A.q'
        this.r = 'A.r'
        this.c = dto.c
        this.setOver();

        if (!this.c || !(this.c instanceof C)) {
            this.c = new C(this.c)
        }
    }
    abstract setOver(): void;
}
class B extends A {
    p = 'B.p'
    q = 'B.q'
    s = 'B.s'

    constructor(dto: any) {
        super(dto);
        console.log('B.constructor')
        this.r = 'B.r'
        this.c = new D(dto.c);
    }

    setOver() {
        console.log('B.setOver')
        this.c.w = 'B.c.w'
    }
}
class C {
    t = 'C.t'
    u: string
    v: any;
    w: any
    constructor(dtoC: any) {
        console.log('C.constructor')
        this.u = 'C.u'
        this.v = dtoC.v;
        this.w = dtoC.w
    }
}
class D extends C {
    constructor(dtoC: any) {
        super(dtoC);
        console.log('D.constructor')
        this.t = 'D.t'
        this.u = 'D.u'
    }
}

var b = new B({c:{v:'b.dto.c.v'}})
console.log(b)