I'm not sure which they're targeting, but early emscripten targeted asm.js, it predated WASM. I would consider asm.js to still be Javascript, it's just an optim

I'm not sure which they're targeting, but early emscripten targeted asm.js, it predated WASM. I would consider asm.js to still be Javascript, it's just an optimized subset of the language. I'll concede though that if they're targeting WASM it's not technically pure Javascript, but it still feels a bit to me like splitting hairs since it's always been explained to me that WASM and the Javascript runtime under the hood have a lot of overlap.