# Current Status * The TC39 proposal is now at stage 3 (馃帀馃帀馃帀馃帀馃帀) * Implementation is in progress * You can expect this feature in TypeScript 3.7 * We'll update here when it's available in a nightly build * Holding off on Optional Call until its semantics are clarified at committee Open questions * What special-casing, if any, should `document.all` get? -------- C# and other languages have syntax sugar for accessing property chains where `null` (or in our case, `undefined`) might be encountered at any point in the object hierarchy. ``` TypeScript var x = { y: { z: null, q: undefined } }; console.log(x?.y?.z?.foo); // Should print 'null' console.log(x?.baz); // Still an error console.log(x.y.q?.bar); // Should print 'undefined' ``` Need proposal on what exactly we should codegen, keeping in mind side effects of accessors. _____ ***Edit by @DanielRosenwasser February 27, 2018:** This proposal is also called the "null propagation" operator.*