'Optional-chaining in Angular

I'm using optional chaining on an object which in turn gives this error after compiling the code

For example

const someObj = {pet_animals: {'dog', 'cat'}};
const duplicate = someObj?.wild_animals;

tsconfig file

Error message

Solution 1:^[1]

optional chaining was introduced in ES2020 freeCodecamp.org. If you are your using js version before ES2020, you will get that error.

That might be the reason why you couldn't use optional chaining,

solution:

duplicate = someObj.wild_animals ? someObj.wild_animals : undefined

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Solution	Source
Solution 1	Vinay Somawat