docs(module): document module.parser.javascript.anonymousDefaultExportName#8242
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…tName Webpack 5.107 introduces a new JS parser option that controls whether webpack sets .name to "default" on anonymous default-export functions and classes (per the ES spec). The fix-up was added in 5.106 but the extra Object.defineProperty calls inflate bundles, so the option defaults to true for applications and false for libraries (when output.library is set). Documents the option under module.parser.javascript. Refs: webpack/webpack#20894
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alexander-akait
approved these changes
May 18, 2026
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Summary
Webpack 5.107 introduces a new JS parser option (
module.parser.javascript.anonymousDefaultExportName) that controls whether webpack sets.nameto"default"on anonymous default-export functions and classes (per the ES spec).The fix-up was added in 5.106 but the extra
Object.definePropertycalls inflate bundles, so the option defaults to:truefor applicationsfalsefor libraries (whenoutput.libraryis set)Documents the option under
module.parser.javascriptinconfiguration/module.mdx.Refs: webpack/webpack#20894
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Use of AI
Drafted with Claude under human review. The contributor verified each change against the upstream webpack PR before commit.