[jokoon]

WASM is just hotfixing javascript to use any language people want.

It's all about javascript being popular and being the standard language, js is not a great language, but it's standard across every computer, which dwarfs anything that can be said about js.

Adjusting browsers so they can use WASM was easy to do, but telling browser vendors to make the DOM work was obviously more difficult, because they might handle the DOM in various ways.

Not to mention js engines are very complicated.