One form of JavaScript interop. Instead of being able to write bindings directly to native code, you had to pass messages through "ports" instead. https://disc

One form of JavaScript interop. Instead of being able to write bindings directly to native code, you had to pass messages through "ports" instead. https://discourse.elm-lang.org/t/native-code-in-0-19/826 https://discourse.elm-lang.org/t/native-code-in-0-19/826 Personally, I was sad to see signals and FRP go in 0.17 https://elm-lang.org/news/farewell-to-frp https://elm-lang.org/news/farewell-to-frp