[{"data":1,"prerenderedAt":191},["ShallowReactive",2],{"blog-launch/react-app":3},{"id":4,"title":5,"body":6,"category":169,"date":170,"dateModified":170,"description":171,"draft":172,"extension":173,"faq":174,"featured":172,"headerVariant":177,"image":178,"keywords":178,"meta":179,"navigation":180,"ogDescription":181,"ogTitle":178,"path":182,"readTime":178,"schemaOrg":183,"schemaType":184,"seo":185,"sitemap":186,"stem":187,"tags":188,"twitterCard":189,"__hash__":190},"blog/blog/launch/react-app.md","React App Launch Security Checklist: 15 Items Before Going Live",{"type":7,"value":8,"toc":163},"minimark",[9,19,22,25,47,66,85,101,123,128,131,134],[10,11,12,16],"tldr",{},[13,14,15],"p",{},"TL;DR",[13,17,18],{},"React apps run entirely in the browser, so never put secrets in your code. Before launch, verify no API keys are exposed, check that sensitive operations go through a backend, test authentication flows, and ensure your build doesn't include source maps in production.",[20,21],"print-button",{},[13,23,24],{},"React is a client-side framework. Everything in your React code is visible to anyone who views your site. This fundamental fact drives most security concerns for React apps. This checklist covers what you need to verify before launch.",[26,27,30,35,39,43],"checklist-section",{"count":28,"title":29},"4","API Keys and Secrets",[31,32],"checklist-item",{"description":33,"label":34},"All code is visible in browser. Secret keys must stay on the server.","Verify no secret keys in client code",[31,36],{"description":37,"label":38},"These are embedded in the build. Only use for public values.","Check REACT_APP_ environment variables",[31,40],{"description":41,"label":42},"Grep for sk_, pk_, api_key, password, secret, token","Search source for hardcoded secrets",[31,44],{"description":45,"label":46},"Check no sensitive data is exposed in API requests/responses","Review Network tab in DevTools",[26,48,50,54,58,62],{"count":28,"title":49},"API and Backend Security",[31,51],{"description":52,"label":53},"Payments, emails, and admin functions need server-side processing","Sensitive operations go through backend",[31,55],{"description":56,"label":57},"Client validation can be bypassed. Server must validate everything.","Backend validates all inputs",[31,59],{"description":60,"label":61},"Don't trust client-side auth state. Verify on every API call.","Backend checks authentication",[31,63],{"description":64,"label":65},"Only allow requests from your domain, not *","CORS is configured correctly",[26,67,69,73,77,81],{"count":28,"title":68},"Authentication",[31,70],{"description":71,"label":72},"Navigate directly to protected URLs in incognito mode","Protected routes redirect without auth",[31,74],{"description":75,"label":76},"Prefer httpOnly cookies over localStorage for auth tokens","Tokens stored securely",[31,78],{"description":79,"label":80},"Tokens should be removed, and back button shouldn't work","Logout clears all auth state",[31,82],{"description":83,"label":84},"Old sessions should expire and require re-login","Session expiration works",[26,86,89,93,97],{"count":87,"title":88},"3","Build and Deployment",[31,90],{"description":91,"label":92},"Source maps expose your original code. Disable for production builds.","Source maps disabled in production",[31,94],{"description":95,"label":96},"http:// should redirect to https://","HTTPS enforced",[31,98],{"description":99,"label":100},"If used, ensure content is sanitized to prevent XSS","Check for dangerouslySetInnerHTML",[102,103,104,111,117],"faq-section",{},[105,106,108],"faq-item",{"question":107},"Is React secure by default?",[13,109,110],{},"React escapes content by default, which prevents most XSS attacks. However, React apps can still have security issues: exposed API keys, insecure API calls, improper use of dangerouslySetInnerHTML, and authentication handled only on the client side.",[105,112,114],{"question":113},"How do I secure API keys in a React app?",[13,115,116],{},"Never put secret API keys in React code. All code sent to the browser is visible. For sensitive operations, create a backend API that makes the calls with your secret keys, and have React call your backend instead.",[105,118,120],{"question":119},"Should I use localStorage for auth tokens?",[13,121,122],{},"LocalStorage is vulnerable to XSS attacks. If an attacker can run JavaScript on your page, they can read localStorage. HttpOnly cookies are more secure for auth tokens because JavaScript can't access them.",[124,125,127],"h3",{"id":126},"scan-your-react-app","Scan Your React App",[13,129,130],{},"Find exposed secrets and security issues automatically.",[13,132,133],{},"Start Free Scan",[135,136,137,143,148,153,158],"related-articles",{},[138,139],"related-card",{"description":140,"href":141,"title":142},"Security checklist for viral readiness. 15 essential items to verify before your app goes viral, covering scale, abuse p","/blog/launch/viral-ready","Viral Ready Security Checklist: 15 Items Before Going Viral",[138,144],{"description":145,"href":146,"title":147},"Pre-launch security checklist for Vue.js applications. 14 essential items covering client-side security, API integration","/blog/launch/vue-app","Vue App Launch Security Checklist: 14 Items Before Going Live",[138,149],{"description":150,"href":151,"title":152},"Security checklist for acquisition readiness. 16 essential items to verify before M&A due diligence, covering code quali","/blog/launch/acquisition-ready","Acquisition Ready Security Checklist: 16 Items Before M&A Due Diligence",[138,154],{"description":155,"href":156,"title":157},"Security checklist for public API launches. 16 essential items to verify before opening your API to external developers,","/blog/launch/api-public-launch","API Public Launch Security Checklist: 16 Items Before Opening Your API",[138,159],{"description":160,"href":161,"title":162},"Security checklist for beta launches. 14 essential items to verify before inviting your first beta users, including data","/blog/launch/beta-launch","Beta Launch Security Checklist: 14 Items Before Inviting Beta Users",{"title":164,"searchDepth":165,"depth":165,"links":166},"",2,[167],{"id":126,"depth":168,"text":127},3,"launch","2026-02-12","Pre-launch security checklist for React applications. 15 essential items covering client-side security, API integration, and deployment best practices.",false,"md",[175,176],{"question":107,"answer":110},{"question":113,"answer":116},"orange",null,{},true,"Pre-launch security checklist for React apps. 15 essential items before deploying.","/blog/launch/react-app","[object Object]","Article",{"title":5,"description":171},{"loc":182},"blog/launch/react-app",[],"summary_large_image","0LTCXChn78C4t-BHWzpE22c9RKtem9nj47Pbf5RqjVg",1775843935868]