So did they write their own layout and JS engine? Or does this use Blink / another dependency under the hood? I found this https://sciter.com/developers/engine

So did they write their own layout and JS engine? Or does this use Blink / another dependency under the hood? I found this https://sciter.com/developers/engine-architecture/ https://sciter.com/developers/engine-architecture/ but it doesn't say if it's all written from scratch or using other libs.