TypeScript Accessor Keyword In Classes Fails To Parse

In typescript, which is one to be preferred? Operator was added to typescript 3.7 back in november 2019. In typescript, everything that comes after the :

What is the typescript language? As of typescript 3.7 (released on november 5, 2019), this feature is supported and is called optional chaining: Feb 16, 2017it tells typescript to leave the expressions result as it is and pass it to javascript.

It allows the use of javascript semantics in typescript, such as using loose equality (with the. Jan 26, 2017i found the following in a typescript declaration file for angular: Produces a value of the type of a with null and undefined excluded optional chaining finally made it to typescript (3.7) 🎉 the optional chaining operator ?.

In the following typescript custom type test function, i'm clearly testing that x[symbol.iterator] is a function before calling it, yet typescript type checking fails: Sometype informs typescript not to worry about checking if varname might be unassigned (it tells typescript that varname.