Hi. What is the difference between using `useEsMod...

# javascript

[Robert Jaros]

Hi. What is the difference between using useEsModules() and kotlinOptions { target = "es2015" } ?

[ephemient]

they're two separate things. https://youtrack.jetbrains.com/issue/KT-12784/JS-generate-ES2015-compatible-modules and https://youtrack.jetbrains.com/issue/KT-8373/JS-support-ES6-as-compilation-target

[Artem Kobzar]

useEsModules() turns on ESM module system, but not other ES2015 features (such as generators, ES-classes, etc).
kotlinOptions { target = "es2015" } turns on all the supported ES2015 features (generators, classes, ES modules) and in future we are going to also add bigint usage, let/const and many more modern features.