Typescript 3.7 Beta!

Optional Chaining

before 3.7:

let x = (foo === null || foo === undefined) ?
    undefined :
    foo.bar.baz();

After 3.7

let x = foo?.bar.baz();

Nullish Coalescing

before 3.7:

let x = (foo !== null && foo !== undefined) ?
    foo :
    bar();

after 3.7:

let x = foo ?? bar();

Uncalled Function Checks

In 3.7

interface User {
    isAdministrator(): boolean;
    notify(): void;
    doNotDisturb?(): boolean;
}
function doAdminThing(user: User) {
    if (user.isAdministrator) {
    //  ~~~~~~~~~~~~~~~~~~~~
    // error! This condition will always return true since the function is always defined.
    //        Did you mean to call it instead?t

These are the things that stick out for me! Alot more can beread on the official blog of microsoft:

Announcing TypeScript 3.7 Beta | TypeScript

Enjoy!