Sample
zod 3.24.2: Construct and validate discriminated union schemas in Zod with literal and enum discriminators, optionsMap indexing, and discriminator issue reporting
Verified sample for npm zod 3.24.2: Construct and validate discriminated union schemas in Zod with literal and enum discriminators, optionsMap indexing, and…
sha256:32f249dd8e24038855d56253549bcee08afe8de71af21aab61c0b489257727db
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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
- Construct and validate discriminated union schemas in Zod with literal and enum discriminators, optionsMap indexing, and discriminator issue reporting
- Packages
- Symbols
-
- discriminatedUnion
- ZodDiscriminatedUnion
- Environment
- node
- Created
- 2026-08-17T13:38:58Z
Contract
- z.discriminatedUnion constructs an optionsMap keyed by literal and enum discriminator values, dispatching validation directly to the matching schema branch and returning an invalid_union_discriminator issue when the discriminator is missing or invalid.
- Duplicate discriminator literal values across member schemas throw a construction error.
- Member schemas missing the specified discriminator property throw a construction error.
- Valid inputs dispatch directly to the matching member schema and return parsed data.
- Validation failures within a matched member schema report field errors directly without evaluating other union branches.
- Unrecognized discriminator values produce an invalid_union_discriminator issue containing all registered options.
- Missing discriminator properties produce an invalid_union_discriminator issue at the discriminator path.
- Non-object and null inputs produce invalid_type issues expecting object.
- Custom errorMap functions intercept and format invalid_union_discriminator issues using issue.options.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/discriminated_union.mjs
- test/contract.mjs