Deploy your JavaScript app to Firebase Hosting
Step-by-step deployment help for JavaScript apps on Firebase Hosting. We fix JavaScript-specific deployment issues, configure Firebase Hosting, and get your app live. From $19.
JavaScript issues we fix before deploying
Common JavaScript problems that affect Firebase Hosting 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.
Firebase Hosting deployment issues we check for
Common Firebase Hosting problems that break JavaScript apps in production.
Firestore security rules allow public read/write
AI tools set Firestore rules to allow read, write: if true for development and never lock them down, exposing the entire database to any authenticated or anonymous user.
Cloud Functions cold start on free Spark plan
Firebase Cloud Functions on the Spark plan have aggressive cold starts and limited concurrency, causing 5-15 second delays on first invocation.
firebase.json rewrites not matching SPA routes
Single-page app routing requires a rewrite rule in firebase.json to send all requests to index.html. AI tools either omit this or misconfigure it alongside Cloud Functions rewrites.
Storage rules expose private user files
Firebase Storage rules generated by AI allow any authenticated user to read any file, rather than restricting access to the file owner.
Start with a self-serve audit
Get a professional review of your JavaScript project before deploying to Firebase Hosting.
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 Firebase Hosting?
We handle JavaScript deployments to Firebase Hosting end to end. Start with our code audit ($19) to identify deployment blockers specific to your JavaScript project, then we configure Firebase Hosting, fix issues, and get your app live in production.
What JavaScript issues affect Firebase Hosting deployments?
JavaScript projects commonly have prototype pollution and loose equality comparisons. On Firebase Hosting, these combine with firestore security rules allow public read/write and cloud functions cold start on free spark plan to cause deployment failures.
Can SpringCode deploy my JavaScript project to Firebase Hosting?
Yes. We specialize in deploying JavaScript applications to Firebase Hosting. We audit your codebase for JavaScript-specific issues, configure Firebase Hosting correctly, and handle the full deployment so your app runs reliably in production.
What does JavaScript deployment to Firebase Hosting cost?
Our code audit ($19) identifies all Firebase Hosting 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 Firebase Hosting
Deploy JavaScript elsewhere
Need help deploying JavaScript to Firebase Hosting?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.