var street = user.address?.street;
var fooValue = myForm.querySelector("input[name=foo]")?.value;

obj?.prop;
obj?.[expr];
func?.(...args);

a?.();
a?.[++x];
a?.b.c(++x).d;
a?.b[3].c?.(x).d;
a?.b.c;
(a?.b).c;
a?.b?.c;
delete a?.b;

a?.b[3].c?.(x).d.e?.f[3].g?.(y).h;

(a?.b).c();
(a?.b[c]).c();

a?.b?.c.d?.e;
(a ? b : c)?.d;

(list || list2)?.length;
(list || list2)?.[list || list2];

async function HelloWorld() {
  var x = (await foo.bar.blah)?.hi;
  a?.[await b];
  (await x)?.();
}

a[b?.c].d();
a?.[b?.c].d();
a[b?.c]?.d();
a?.[b?.c]?.d();

one?.fn();
(one?.two).fn();
(one?.two)();
(one?.two())();
one.two?.fn();
(one.two?.three).fn();
one.two?.three?.fn();

one?.();
(one?.())();
one?.()?.();

(one?.()).two;

a?.[b ? c : d];

(-1)?.toFixed();
(void fn)?.();
(a && b)?.();
(a ? b : c)?.();
(function () {})?.();
(() => f)?.();
(() => f)?.x;
(a?.(x)).x;
(
  aaaaaaaaaaaaaaaaaaaaaaaa &&
  aaaaaaaaaaaaaaaaaaaaaaaa &&
  aaaaaaaaaaaaaaaaaaaaaaaa
)?.();

let f = () => ({}?.());
let g = () => ({}?.b);
a = () => ({}?.() && a);
a = () => ({}?.()() && a);
a = () => ({}?.().b && a);
a = () => ({}?.b && a);
a = () => ({}?.b() && a);
(a) => ({}?.()?.b && 0);
(a) => ({}?.b?.b && 0);
(x) => ({}?.()());
(x) => ({}?.().b);
(x) => ({}?.b());
(x) => ({}?.b.b);
({}?.a().b());
({ a: 1 }?.entries());

new (foo?.bar)();
new (foo?.bar())();
new (foo?.())();