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Chromium 138 size requirement changes for GPUBuffers mapped at creation #28210
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Chromium 138 size requirement changes for GPUBuffers mapped at creation #28210
chrisdavidmills
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added
data:api
Compat data for Web APIs. https://developer.mozilla.org/docs/Web/API
size:m
[PR only] 25-100 LoC changed
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Oct 16, 2025
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Summary
In Chrome 138, the size requirements for
GPUBuffers mapped at creation have changed. During aGPUDevice.createBuffer()call, ifmappedAtCreationis settrueandsizeis not a multiple of4, aRangeErrorexception is thrown.See https://developer.chrome.com/blog/new-in-webgpu-138#size_requirement_changes_for_buffers_mapped_at_creation.
This PR adds a data point for the change.
Test results and supporting details
Related issues