[browser][CoreCLR] smoke test libraries on V8 and Firefox by pavelsavara · Pull Request #124641 · dotnet/runtime · GitHub

pavelsavara · 2026-02-20T14:36:25Z

smoke test V8 + FF
version check for shells

- version check for shell

dotnet-policy-service · 2026-02-20T14:37:17Z

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Pull request overview

This PR expands the WebAssembly/CoreCLR smoke-test matrix to run library tests on Firefox and a V8 shell, and adds runtime version gating in the JS loader to fail fast on unsupported Node.js / shell versions.

Changes:

Add Node.js (>= 18) and V8 shell (>= 14) version checks to validateWasmFeatures() in the JS loader bootstrap.
Update the runtime pipeline to run CoreCLR wasm smoke/library tests on Firefox and V8 in addition to Chrome.

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Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
`src/native/libs/Common/JavaScript/loader/bootstrap.ts`	Adds engine/runtime version checks during wasm feature validation.
`eng/pipelines/runtime.yml`	Enables additional wasm test scenarios (Firefox + V8) for CoreCLR library smoke tests.

src/native/libs/Common/JavaScript/loader/bootstrap.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

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Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

src/native/libs/Common/JavaScript/loader/bootstrap.ts

eng/pipelines/runtime.yml

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Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

src/native/libs/Common/JavaScript/loader/bootstrap.ts

pavelsavara · 2026-02-20T16:31:57Z

Log

[15:52:29] info: Warning: unknown flag --expose_wasm.
[15:52:29] info: Try --help for options
[15:52:29] info: Incoming arguments: --setenv=DOTNET_TEST_WEBSOCKETHOST=127.0.0.1:35879 --setenv=DOTNET_TEST_HTTPHOST=127.0.0.1:35879 --setenv=DOTNET_TEST_REMOTE_LOOP_HOST=127.0.0.1:35879 --setenv=DOTNET_TEST_SECUREWEBSOCKETHOST=127.0.0.1:33769 --setenv=DOTNET_TEST_SECUREHTTPHOST=127.0.0.1:33769 --setenv=DOTNET_TEST_HTTP2HOST=127.0.0.1:33769 --setenv=XHARNESS_LOG_TEST_START=true --run WasmTestRunner.dll System.Runtime.InteropServices.JavaScript.Tests.dll -parallelThreads 1 -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing
[15:52:29] info: Application arguments: --run WasmTestRunner.dll System.Runtime.InteropServices.JavaScript.Tests.dll -parallelThreads 1 -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing
[15:52:29] info: WASM EXIT 1
[15:52:29] info: Process v8 exited with 1

pavelsavara · 2026-02-20T16:36:06Z

Firefox went just fine: Log

radekdoulik

Thank you, LGTM

jkotas · 2026-02-20T16:55:04Z

src/mono/browser/runtime/loader/polyfills.ts

 export function verifyEnvironment () {
-    mono_assert(ENVIRONMENT_IS_SHELL || typeof globalThis.URL === "function", "This browser/engine doesn't support URL API. Please use a modern version. See also https://aka.ms/dotnet-wasm-features");
-    mono_assert(typeof globalThis.BigInt64Array === "function", "This browser/engine doesn't support BigInt64Array API. Please use a modern version. See also https://aka.ms/dotnet-wasm-features");
+    mono_assert(ENVIRONMENT_IS_SHELL || typeof globalThis.URL === "function", "This browser/engine doesn't support URL API. Please use a modern version. See also https://learn.microsoft.com/en-us/aspnet/core/blazor/supported-platforms");


We typically omit en-us in the doc URLs so that the URL opens localized content based on user preferences.

jkotas · 2026-02-20T17:15:02Z

src/mono/browser/runtime/http.ts

        const message = ENVIRONMENT_IS_NODE
-            ? "Please install `node-fetch` and `node-abort-controller` npm packages to enable HTTP client support. See also https://aka.ms/dotnet-wasm-features"
-            : "This browser doesn't support fetch API. Please use a modern browser. See also https://aka.ms/dotnet-wasm-features";
+            ? "Please install `node-fetch` and `node-abort-controller` npm packages to enable HTTP client support. See also https://learn.microsoft.com/en-us/aspnet/core/blazor/supported-platforms"


Do we have any official docs for node? I think the node links can point to internal runtime docs (maybe even have direct links without aka.ms indirection).

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Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.

- smoke test V8 + FF

238ea2d

- version check for shell

pavelsavara added this to the 11.0.0 milestone Feb 20, 2026

pavelsavara requested review from ilonatommy, maraf and radekdoulik February 20, 2026 14:36

pavelsavara self-assigned this Feb 20, 2026

Copilot AI review requested due to automatic review settings February 20, 2026 14:36

pavelsavara added arch-wasm WebAssembly architecture area-Infrastructure-coreclr os-browser Browser variant of arch-wasm labels Feb 20, 2026

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Update src/native/libs/Common/JavaScript/loader/bootstrap.ts

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Copilot AI review requested due to automatic review settings February 20, 2026 14:42

Update src/native/libs/Common/JavaScript/loader/bootstrap.ts

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pavelsavara added 2 commits February 20, 2026 15:55

Simpler, V8 only

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pavelsavara requested a review from lewing as a code owner February 20, 2026 16:45

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fix fetchlike

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build-analysis bot mentioned this pull request Feb 20, 2026

"We stopped hearing from agent Azure Pipelines 32. Verify the agent machine is running and has a healthy network connection" dotnet/dnceng#1886

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