Migrating to ESLint v10.0.0-rc.0
Version v10.0.0-rc.0 introduces 1 breaking change. This guide details how to update your code.
Released: 1/9/2026
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Breaking Changes
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Migration Steps
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Affected Symbols
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rule-testermax-paramsverifyAndFixParserOptionsScopeverifyBreaking Changes
●Issue #1
The `rule-tester` now estimates the failure location for rule tests. This might change how test failures are reported.
Migration Steps
- 1If you are using `rule-tester` and relying on specific error message formats for failure locations, you may need to adjust your tests due to the new failure location estimation.
Release Summary
This release introduces improvements to the rule tester, including better failure location estimation and new assertion options. It also includes several bug fixes and documentation updates.
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View the full release notes and all changes for ESLint v10.0.0-rc.0.
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