Bolt
deployment
ESLint Error Blocking Build - Build Fails on Lint
Your build fails because of ESLint warnings/errors. Code is correct but linter complains and build exits.
Works locally with warnings but deployment fails on lint.
Error Messages You Might See
Build failed - ESLint error
Error: 'variable' is defined but never used
Error: Missing 'key' prop
Error: Rules of Hooks violation
Common Causes
- ESLint strict mode enabled in build (treatWarningsAsErrors)
- Unused variables or imports flagged as errors
- Rules too strict for development environment
- ESLint config different between local and deployment
- Missing eslintrc file in deployment environment
How to Fix It
Check next.config.js: eslint setting controls build behavior
Disable during development: eslint: { ignoreDuringBuilds: true }
Fix actual issues: remove unused imports, follow rule suggestions
Override specific rules in .eslintrc if they're too strict
Or: add // eslint-disable-next-line above problematic lines as last resort
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Get HelpFrequently Asked Questions
Should I disable ESLint for build?
No, fix the actual issues. ESLint catches real bugs. ignoreDuringBuilds is temporary workaround
What's // eslint-disable-next-line for?
Suppresses single rule for one line. Use sparingly - better to fix actual issue
How do I customize ESLint rules?
Edit .eslintrc file. Set rules to 'off', 'warn', or 'error'. Or extend shared configs