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conformance · v149

v149 · webassembly-custom-descriptors — conformance probe

6 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://github.com/WebAssembly/custom-descriptors/blob/main/proposals/custom-descriptors/Overview.md chromestatus: #6024844719947776 generated 2026-06-01T08:15:14Z by conformance-author-v1-subagent
0
pass
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fail
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blocked
6
total
id contract kind verdict detail
webassembly-namespace-exists The WebAssembly global namespace is exposed. spec ↗ exists
webassembly-module-exists WebAssembly.Module constructor is exposed (used to load modules with custom descriptors). spec ↗ exists
webassembly-validate-supports-typed-funcref WebAssembly.validate accepts the smallest valid module (proxy for tooling pipeline). spec ↗ script
webassembly-instance-exists WebAssembly.Instance is exposed (the host object whose prototype is configured by custom descriptors). spec ↗ exists
webassembly-suspending-or-promising-still-present Earlier JS-promise integration surfaces (WebAssembly.Suspending) remain — custom descriptors are additive. spec ↗ script
webassembly-compile-streaming-exists WebAssembly.compileStreaming still exists — streaming compilation works with descriptors. spec ↗ typeof