There are plans for WebAssembly modules to directly access the DOM: https://github.com/WebAssembly/gc/blob/master/proposals/gc/O...

I really don't know much about wasm.

I just wondered though, from a birds eye view, does using wasm effectively give you control of everything within the "frame" of your browser?

Can I get rid of the DOM(boilerplate aside), get rid of CSS?

For example HTMLCanvasElement is a flat surface. I can do what I want within it as a scene graph renderer.

Could I do that with wasm? Could I invent my own 2D entities (x, y, width, height). My own 2D Constraints resize like Apple Devices etc?

It's still in the same sandbox as JavaScript. You don't get any new API's. There's only going to be speedup on CPU-intensive things.

> wasm is not a drop-in replacement for JS

It is not a "drop-in" replacement in any way, but I'm pretty sure it will eventually replace JS completely.

No, but if we're being honest, it's exactly what everyone wants it to be. A bytecode for the web.

Eventually the Dom might be replaced with some webgl renderer.