Sample
Yoga 3 defaults to BoxSizing.BorderBox where fixed dimensions include padding and border, configures flexShrink 0 and Column direction unless useWebDefaults is enabled, restricts measure functions to leaf nodes with dirty-mark caching, collapses Display.None geometry, and recalculates cross-axis dimensions from aspectRatio
sha256:0cdcd24cba1e2dc947e55e89f78898ff999517534a16500b5593885743ac3f7b
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- node
- Operating system
- linux
- Architecture
- x64
- Runtime
- node
- Language
- node
- Package manager
- npm
Verification-run environments
- Execution context
- node 22
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17
Case
- Goal
- Yoga 3 defaults to BoxSizing.BorderBox where fixed dimensions include padding and border, configures flexShrink 0 and Column direction unless useWebDefaults is enabled, restricts measure functions to leaf nodes with dirty-mark caching, collapses Display.None geometry, and recalculates cross-axis dimensions from aspectRatio HOW
- Packages
-
yoga-layout 3.2.1
- Environment
- node
- Created
- 2026-08-17T20:40:40Z
Commonly assumed
Setting explicit dimensions with padding and border calculates content-box size like web CSS, and container overflow automatically shrinks child items without configuring web defaults.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- Yoga 3 defaults node box-sizing to BoxSizing.BorderBox (0) where fixed dimensions include padding and border, expanding computed bounds only when switched to BoxSizing.ContentBox (1)
- Config defaults useWebDefaults to false with flexShrink 0 preventing overflow compression, while useWebDefaults(true) enables Row direction and flexShrink 1
- Measure functions are leaf-only, cached across layout evaluations until markDirty is invoked, and abort if children are inserted
- Display.None collapses computed layout rectangle to zero dimensions and removes the node from sibling flow calculation
- AspectRatio dynamically recalculates the cross-axis dimension from the main-axis dimension during layout
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9