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

  1. ESLint strict mode enabled in build (treatWarningsAsErrors)
  2. Unused variables or imports flagged as errors
  3. Rules too strict for development environment
  4. ESLint config different between local and deployment
  5. 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

Real developers can help you.

Jared Hasson Jared Hasson Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever Luca Liberati Luca Liberati I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture Stanislav Prigodich Stanislav Prigodich 15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it. Daniel Vázquez Daniel Vázquez Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting. Alvin Voo Alvin Voo I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing. My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream. What I bring to your project: Forensic Debugging: I don't just "patch" bugs; I use tools like Datadog and Explain Analyzers to map out bottlenecks and resolve root causes—like significantly reducing memory usage by optimizing complex DB joins. Full-Stack Context: Deep experience in Node.js and React, ensuring backends play perfectly with mobile and web teams. Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last. Jen Jacobsen Jen Jacobsen I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses. I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain. Pratik Pratik SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure Yovel Cohen Yovel Cohen I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well. PawelPloszaj PawelPloszaj I'm fronted developer with 10+ years of experience with big projects. I have small backend background too Taufan Taufan I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms. Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.

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Frequently 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

Related Bolt Issues

Can't fix it yourself?
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