TypeScript 3.7: Optional Chaining and Nullish Coalescing

This new features are very interesting because maintain our code cleaner.

The Optional Chaining ( ? operator ) it was already used in Angular templates.

The Nullish Coalescing ( ?? operator ) is similar to || operator, the differences is explained here TypeScript 3.7 - What's New

Sources:
TypeScript 3.7 - What's New

(Portugues video) Angular: Novidades Angular v9 Ivy: TypeScript 3.7 (optional chaining e coalescência nula)