Blazor Collocate js and cs files

It is possible to collocate a .js file and a related .razor file as described here.Is there a way to collocate a .js file and .cs file in a similar way? I image it looking similar to this:

MyService.cs

public class MyService{    private readonly IJSRuntime _js;    private IJSObjectReference? _jsModule;    public MyService(IJSRuntime js)    {        _js = js;    }    public async Task MyMethod()    {        if (_jsModule == null)        {            var modulePath = $"./_content/Company.Library/Service/MyService.cs.js";            _jsModule = await _js.InvokeAsync<IJSObjectReference>("import", modulePath);        }        await _jsModule.InvokeVoidAsync("myjsmethod");    }}

MyService.cs.js

export function myjsmethod() {    console.log('Hello World');}

This compiles fine, but when run the MyService.cs.js file fails to load with the error "failed to fetch dynamically imported module"