Deploy your JavaScript app to Supabase
Step-by-step deployment help for JavaScript apps on Supabase. We fix JavaScript-specific deployment issues, configure Supabase, and get your app live. From $19.
JavaScript issues we fix before deploying
Common JavaScript problems that affect Supabase 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.
Supabase deployment issues we check for
Common Supabase problems that break JavaScript apps in production.
Row Level Security disabled on tables
AI tools create tables without enabling RLS, allowing any user with the anon key to read, modify, or delete all data in those tables.
Service role key exposed in client-side code
The service_role key bypasses RLS entirely. AI tools sometimes embed it in frontend code instead of restricting it to server-side operations only.
Edge Functions hitting CPU time limits
Supabase Edge Functions have a 150ms CPU time limit on the free plan. AI-generated functions with heavy computation or unoptimized queries hit this limit under load.
Storage policies too permissive
Supabase Storage buckets created by AI have public access enabled or policies that allow any authenticated user to read all files, ignoring per-user access control.
Start with a self-serve audit
Get a professional review of your JavaScript project before deploying to Supabase.
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 Supabase?
We handle JavaScript deployments to Supabase end to end. Start with our code audit ($19) to identify deployment blockers specific to your JavaScript project, then we configure Supabase, fix issues, and get your app live in production.
What JavaScript issues affect Supabase deployments?
JavaScript projects commonly have prototype pollution and loose equality comparisons. On Supabase, these combine with row level security disabled on tables and service role key exposed in client-side code to cause deployment failures.
Can SpringCode deploy my JavaScript project to Supabase?
Yes. We specialize in deploying JavaScript applications to Supabase. We audit your codebase for JavaScript-specific issues, configure Supabase correctly, and handle the full deployment so your app runs reliably in production.
What does JavaScript deployment to Supabase cost?
Our code audit ($19) identifies all Supabase 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 Supabase
Deploy JavaScript elsewhere
Need help deploying JavaScript to Supabase?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.