[blazor][wasm] load .js and .wasm assets by runtime

[pavelsavara]

• use config.assets to pass URL of dotnet.wasm and dotnet-crypto-worker.js
• pass downloadResource callback to runtime which bridges the runtime to use WebAssemblyResourceLoader for loading assets
• let runtime to do streaming instantiateWasm
• change to WebAssemblyResourceLoader to return absolute URLs. For debugger purposes.
• add new type definitions
• use setModuleImports instead of IMPORTS

[pavelsavara]

The issue is
error: Failed to start platform. Reason: TypeError: Cannot convert undefined or null to object at Kt (http://127.0.0.1:38689/subdir/_framework/blazor.webassembly.js:1:61927

I didn't dig deeper yet.

[lambdageek]

Repros locally.

Is there a way to run one of the E2E tests by hand in a browser to debug the JavaScript? (ie without Selenium)

[SteveSandersonMS]

@lambdageek Yes. Start up the src\Components\test\testassets\TestServer project. It will present a UI with a dropdown that lets you pick which test component you want to run.

You may have to visit something like https://localhost:5003/subdir once the testserver is running - can't remember the URL exactly. The browser might open with it automatically. It does a weird thing where the port number changes each time you start it.

[lambdageek]

This is the problem for the E2E tests:

resourceLoader.bootConfig.resources doesn't have a runtimeAssets key. It has a runtime key, is that what we want?

[lambdageek]

Looks like it needs to be in sync with

https://github.com/dotnet/sdk/blob/4547cf714749f732b53a5c70edd269a33e75bd28/src/BlazorWasmSdk/Tasks/BootJsonData.cs#L14

according to the comment in

aspnetcore/src/Components/Web.JS/src/Platform/BootConfig.ts

Lines 46 to 47 in 7b5da42

	// Keep in sync with bootJsonData from the BlazorWebAssemblySDK
	export interface BootJsonData {

and indeed that defines

https://github.com/dotnet/sdk/blob/4547cf714749f732b53a5c70edd269a33e75bd28/src/BlazorWasmSdk/Tasks/BootJsonData.cs#L61-L64

[javiercn]

@lambdageek no, there was a change in the SDK (last week I think) to add this additional key.

[lambdageek]

Ah runtimeAssets are there too.
https://github.com/dotnet/sdk/blob/4547cf714749f732b53a5c70edd269a33e75bd28/src/BlazorWasmSdk/Tasks/BootJsonData.cs#L106

Maybe we just need to merge this PR with main to get an SDK bump?

Or maybe the E2E tests are using the sdk from <gitroot>/.dotnet and that one is older?

[lambdageek]

Merging main wasn't enough. we probably need the SDK update PR #43028.

I'm verifying locally...

[lambdageek]

Success! We're blocked on an SDK bump

[lambdageek]

Not sure what the next steps are here. I think we still want this for net7 rc1. But it's unclear to me if the sdk bump PR is going into that branch

/cc @lewing

[pavelsavara]

replaced by #45628

[ghost]

Hi @pavelsavara. It looks like you just commented on a closed PR. The team will most probably miss it. If you'd like to bring something important up to their attention, consider filing a new issue and add enough details to build context.