# Page Not Found

`/docs/conformance/rules/no_instanceof_error` does not exist. Similar pages:

- [NO_INSTANCEOF_ERROR](/docs/conformance/rules/no_instanceof_error.md): Conformance is available on Enterprise plans This rule is available from version 1.5.0. A common pattern for checking if an object is an error is to
- [Conformance Rules](/docs/conformance/rules.md): Requires that ESLint is configured for React. ESLINT\_RULES\_REQUIRED Requires that Next.js applications that use libraries with barrel exports use
- [TESTS_NO_CONDITIONAL_ASSERTIONS](/docs/conformance/rules/tests_no_conditional_assertions.md): Conformance is available on Enterprise plans When possible, conditional test assertions should be avoided as they can lead to false test passes if
- [Conformance Custom Rules](/docs/conformance/custom-rules.md): Conformance is available on Enterprise plans Vercel's builtin Conformance rules are crafted from extensive experience in developing largescale
- [1.7.0](/docs/conformance/changelog.md): This minor update captures and sends Conformance runs metrics to Vercel. Your team will be able to view those metrics in the Vercel dashboard. The

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