Pure html/css rendering. JS support could be addressed trivially in the build system by transpiling anything unsupported by the oldest likely target.
Pure html/css rendering. JS support could be addressed trivially in the build system by transpiling anything unsupported by the oldest likely target.
Not all JS APIs are fully pollyfillable, especially ones that are part of the Web platform rather than ECMAScript. I dunno if it's a bigger problem overall than HTML/CSS, probably not, but it's not consistently trivial.