If you are reading this, your browser did not run the module. That is the expected result in every shipping browser, and this text is what stays on screen when it happens. An engine that binds the module's imports replaces everything in this element with what the module builds, and the first thing it says is that it ran. There is no third state: you are looking at one answer or the other, never at a page that could be either.
A screen recording of the module rendering in an engine that binds its imports. Evidence of the result, not of the mechanism — the mechanism is checkable from this page's source and from the module itself, and neither asks you to trust a recording or install anything. Nothing downloads until you press play.
This page has no script. Its interface is a WebAssembly module that builds the document directly, calling host functions that operate on the browser's own node arena. There is no glue layer, and no JavaScript engine anywhere in the path between the program and the DOM.
In every shipping browser the DOM is a JavaScript API, so a WebAssembly program reaches it either through generated glue or by proxying mutations to another thread. Both pay a cost designed for a different language. This is what the arrangement looks like when the DOM was never a JavaScript API to begin with.
One thing: the module. Its own sections carry the templates it needs and the version of the reactive runtime it was compiled against. Both the shared template set and that runtime are provided by the engine, so neither is fetched.
If you are reading this, the module did not run. That is the expected result in a browser that cannot bind its imports, and it is deliberate: nothing here degrades into a partial interface. Compiled artifacts are immutable and content-addressed; only this document ever changes.