Sample
typescript 5.9.3: Enforce type-only import/export syntax and module boundary semantics under compilerOptions.verbatimModuleSyntax in TypeScript 5.9.3
Verified sample for npm typescript 5.9.3: Enforce type-only import/export syntax and module boundary semantics under compilerOptions.verbatimModuleSyntax in…
sha256:296598dcddee3a2413292e3f97d05ceb6034b6814d99f83ad77bc2bf096af918
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
- Enforce type-only import/export syntax and module boundary semantics under compilerOptions.verbatimModuleSyntax in TypeScript 5.9.3
- Packages
- Symbols
-
- ts.CompilerOptions.verbatimModuleSyntax
- Environment
- node
- Created
- 2026-08-17T13:25:23Z
Contract
- When compilerOptions.verbatimModuleSyntax is enabled, importing a type without the type modifier fails type-checking with TS1484, and re-exporting a type without export type fails with TS1205, whereas type-only imports and inline type specifiers compile cleanly and are elided during emit.
- compilerOptions.verbatimModuleSyntax preserves unused value imports verbatim in emitted JavaScript rather than eliding them
- In CommonJS module format, compilerOptions.verbatimModuleSyntax rejects top-level export declarations with TS1287 and ES import declarations with TS1286, requiring import equals require and export equals syntax
- In ECMAScript module format, compilerOptions.verbatimModuleSyntax rejects CommonJS export assignment syntax with TS1203
- Specifying removed legacy options importsNotUsedAsValues or preserveValueImports alongside verbatimModuleSyntax produces configuration diagnostics with TS5102
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/index.mjs
- test/contract.mjs