Deploy your JavaScript app to Vercel
Step-by-step deployment help for JavaScript apps on Vercel. We fix JavaScript-specific deployment issues, configure Vercel, and get your app live. From $19.
JavaScript issues we fix before deploying
Common JavaScript problems that affect Vercel deployments.
Prototype pollution
AI-generated code merges user-supplied objects into prototypes via Object.assign or spread operators without sanitization, enabling property injection attacks.
Loose equality comparisons
Using == instead of === leads to type coercion bugs where '0' == false, null == undefined, and other non-obvious truthy/falsy comparisons cause silent logic errors.
Unhandled promise rejections
Async functions without try/catch or .catch() handlers cause unhandled rejection warnings and silent failures in production.
Global variable leaks
Missing 'const' or 'let' declarations create implicit globals that pollute the global scope and cause unpredictable behavior across modules.
Vercel deployment issues we check for
Common Vercel problems that break JavaScript apps in production.
Serverless function size exceeds 50MB limit
AI tools bundle heavy dependencies into API routes without tree-shaking, pushing serverless functions past Vercel's 50MB compressed size limit and failing the build.
Edge runtime incompatible with Node.js APIs
Generated code uses fs, crypto, or other Node.js built-ins inside Edge Runtime routes, causing deployment failures since Edge only supports a subset of Web APIs.
ISR revalidation not triggering correctly
Incremental Static Regeneration configured with stale revalidate values or missing on-demand revalidation hooks, serving outdated content indefinitely.
Environment variables missing in production
Secrets added to .env.local but not configured in the Vercel dashboard, causing runtime crashes only in production while working perfectly in local dev.
Start with a self-serve audit
Get a professional review of your JavaScript project before deploying to Vercel.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
How do I deploy a JavaScript app to Vercel?
We handle JavaScript deployments to Vercel end to end. Start with our code audit ($19) to identify deployment blockers specific to your JavaScript project, then we configure Vercel, fix issues, and get your app live in production.
What JavaScript issues affect Vercel deployments?
JavaScript projects commonly have prototype pollution and loose equality comparisons. On Vercel, these combine with serverless function size exceeds 50mb limit and edge runtime incompatible with node.js apis to cause deployment failures.
Can SpringCode deploy my JavaScript project to Vercel?
Yes. We specialize in deploying JavaScript applications to Vercel. We audit your codebase for JavaScript-specific issues, configure Vercel correctly, and handle the full deployment so your app runs reliably in production.
What does JavaScript deployment to Vercel cost?
Our code audit ($19) identifies all Vercel deployment blockers in your JavaScript project. Full deployment assistance is scoped with a fixed quote after the audit — no hourly billing or surprise charges.
Related resources
Other techs on Vercel
Deploy JavaScript elsewhere
Need help deploying JavaScript to Vercel?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.