CodeSampleX

Sample

postcss 8.5.26: Configure PostCSS source map output using the map option to produce an external source map object rather than an inlined data URI

Verified sample for npm postcss 8.5.26: Configure PostCSS source map output using the map option to produce an external source map object rather than an…

sha256:221c662febb9ecd93d2ebacebe2775d2066adba800247e7c0af8e4a9bb4b411c

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
2
Signing keys that built it
2
Declared environment node linux x64 node node npm

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-17
node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-18

Case

HOW
Goal
Configure PostCSS source map output using the map option to produce an external source map object rather than an inlined data URI
Packages
Symbols
  • postcss
Environment
node
Created
2026-08-17T10:22:01Z

Contract

  1. postcss.process(css, { map: true }) leaves result.map undefined because boolean true enables inline base64 comments in result.css, requiring map: { inline: false } to populate result.map with an external SourceMapGenerator
  2. map: { inline: false } populates result.map with a SourceMapGenerator whose toJSON() contains sources and mappings, while appending an external /*# sourceMappingURL=output.css.map */ comment to result.css
  3. map: { annotation: false } or map: { inline: false, annotation: false } populates result.map with an external SourceMapGenerator without appending any sourceMappingURL comment to result.css
  4. map: false disables source mapping entirely and strips existing sourceMappingURL comments from input CSS, leaving result.map undefined
  5. map: { prev: false, inline: false } ignores existing source map comments in input CSS and roots new mappings to the immediate input file rather than chaining previous sources

Files

  • NOTES.md
  • csx.json
  • package-lock.json
  • package.json
  • test/contract.mjs

Download the source artifact (tar.gz)

Origin Seeder

csx-seed