GitHub - Acanguven/ts-safe-access: Elvis operator (aka safe navigation) implementation with typescript plugin.

Hacky way to implement elvis operator (aka safe navigation) with typescript plugin.

Module Transpiler

If you want to just get the corresponding JavaScript output given TypeScript sources. For this you can use ts.transpileModule to get a string => string transformation like below.

Custom Compiler

If you want get custom compiler only in addition to native tsc that's run custom transformer before compilation. Custom compiler that will take a list of TypeScript files and compile down to their corresponding JavaScript files.

Source

console.log(a.test?.way?.dd.cc?.uu);
console.log(ac?.test?.test2);
console.log(ac?.test[3]?.test2);
console.log(a?.test);
console.log(a.test?a.c?4:32:3)

Compiled

console.log((((a.test || {}).way || {}).dd.cc || {}).uu);
console.log(((ac || {}).test || {}).test2);
console.log(((ac || {}).test[3] || {}).test2);
console.log((a || {}).test);
console.log(a.test ? a.c ? 4 : 32 : 3);

Install

npm i ts-safe-access --save --dev

Usage

ttsc <input_file_name>.ts

Module transpiler example can be found here

Custom compiler example can be found here