Build: Remove unused JXL WASM module from vips worker#76617
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Build: Remove unused JXL WASM module from vips worker#76617adamsilverstein wants to merge 1 commit into
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WordPress Core does not currently support JXL images - it is not in CLIENT_SIDE_SUPPORTED_MIME_TYPES. Removing the unused vips-jxl.wasm import reduces the worker bundle from 16.1 MB to 13.1 MB (3.0 MB / 18%). JXL support can be trivially re-added by restoring the import and adding 'vips-jxl.wasm' back to the dynamicLibraries array when Core adds JXL support. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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This was referenced Mar 18, 2026
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Reopened from origin branch as #76639 |
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Summary
Removes the unused
vips-jxl.wasmmodule from the vips worker bundle to reduce build size. WordPress Core does not currently support JXL images — it is not inCLIENT_SIDE_SUPPORTED_MIME_TYPES— so this WASM module is loaded but never used.Size impact
worker.min.jsChanges
vips-jxl.wasmimport frompackages/vips/src/index.tsdynamicLibrariesto only loadvips-heif.wasm(still needed for HEIF/HEIC input and AVIF support)locateFilecallbackFuture size reduction opportunities
Beyond this PR, a custom
wasm-vipsbuild could yield further savings:--enable-lto)-e web)See also:
Re-adding JXL
If WordPress Core adds JXL support in the future, it can be trivially restored by:
import VipsJxlModule from 'wasm-vips/vips-jxl.wasm''vips-jxl.wasm'back to thedynamicLibrariesarraylocateFileTest plan
npm run buildand verifybuild/modules/vips/worker.min.jsis ~13.1 MB (down from 16.1 MB)🤖 Generated with Claude Code