# `HoloInputError.constructor`

> Contract 2.0.0 · package sha256 `a857eca95b35921109faf997094bb4192f12527d9d0fcd4be7e97f06425bad6e` · generated from `configurator-runtime.d.ts` by `services/onsite-scripter/scripts/build-contract-docs.mjs`; edit the source, not this file.

Constructor of [`HoloInputError`](HoloInputError.md) · stable · since 2.0.0

```ts
constructor(code: InputErrorCode, message: string, detail?: {
  path?: string;
  expected?: string;
  received?: string;
  didYouMean?: readonly string[];
  fix?: string;
});
```

As the runtime builds it: `message` becomes `` `${code}: ${message}` ``, `detail`'s fields
the same-named ones, [`docs`](HoloInputError.docs.md) the code's page. Public so app tests can build the error a
mocked member rejects with; the fake's `script()` gives the runtime's real ones.

**Default:** detail {} (path, expected and received '')

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `constructor` names no product |
| 2. A precedent | not recorded: no ledger row (coverage.json) names this member or its owner |
| 3. Two apps, or labs | not recorded: no ledger row names this member or its owner |
| 4. The cheaper fix first | not recorded per member (Appendix B decides it per need) |