I've tried to make sure every new feature we added to the API is easily feature detectable. We should probably run through the recent additions and make sure they're OK.

• Features that don't need to be detectable, because if you were going to detect, you would just use the old version instead.
  • Allow GPUTexture where GPUTextureView is used #5228 - in the meeting I said we needed feature detection for this. On second thought, that isn't necessary: if you were going to bother to feature detect this, you could just not bother and call .createView() instead. (Actually I might have discussed this with François at the time, I just probably forgot to ever write it down.)
  • copyBufferToBuffer: make offsets and sizes optional #5098
• Allow index < limits.maxBindGroups in getBindGroupLayout() #5042
  • Maybe not needed for similar reason
• Adds the snorm10-10-10-2 vertex format to the WebGPU specification and WebIDL definition. #6491
• Clarification of Sample Mask with respect to Sample Shading #5457 - portability bugfix, probably doesn't need feature detection
• copyExternalImageToTexture: allow all unorm/unorm-srgb/float/ufloat textures #5333
• Allow using a texture view for an externalTexture binding #5079
• TODO check for more? (I already looked at commits starting in 2025, so only would need to look at 2024 and earlier)
  • There were some vertex or texture formats too (EDIT: including Add 1-component vertex formats and unorm8x4-bgra #4951)

Possible upcoming additions:

• Multisampled array textures: WGSL enable extension versus device feature #6283
• Add texture-compression-unaligned feature to relax texture size block alignment requirement. #6312
• Consider lifting size%4 requirement of copyBufferToBuffer and writeBuffer #5203