A modern programming language that makes developers happier.

kotlinlang

Going through the release notes of the latest version of Typescript, some features are real head scratchers:
```
interface Config {
    [prop: string]: boolean;
}

declare const options: Config;

// Used to be an error, now allowed!
if (options.debugMode) {
    // ...
}```

TS: ```declare const options: any;
if (options.debugMode) ...```
TS.stricter: ```interface Config { debugMode: boolean }
declare const options: Config;
if (options.debugMode) ...```
TS.stricter.relaxed: ```interface Config { [prop: string]: boolean }
declare const options: Config;
if (options["debugMode"]) ...```
TS.stricter.relaxed.looksStricter: ```interface Config { [prop: string]: boolean }
declare const options: Config;
if (options.debugMode) ...```

I understand the reason behind the index string type (and also the interesting `keyof`), I wonder if Kotlin will have to make similar sacrifices for its Javascript backend