JSTests/test262/test/language/expressions/optional-chaining/optional-expression.js

// Copyright 2019 Google, Inc.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-OptionalExpression
description: >
  optional chain on recursive optional expression
info: |
  Left-Hand-Side Expressions
    OptionalExpression:
      OptionalExpression OptionalChain
features: [optional-chaining]
---*/

const obj = {
  a: {
    b: 22
  }
};

function fn () {
  return {};
}

// OptionalExpression (MemberExpression OptionalChain) OptionalChain
assert.sameValue(22, obj?.a?.b);
// OptionalExpression (CallExpression OptionalChain) OptionalChain
assert.sameValue(undefined, fn()?.a?.b);