#16 most commonbuildLovableBolt.newCursorReplitv0Windsurf

TypeScript errors break the build (error TS2322, TS2339 ...)

error TS2322: Type 'string | undefined' is not assignable to type 'string'. / error TS2339: Property 'x' does not exist on type 'Y'. / Type error: ... (next build)

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What it means

TypeScript is a spell-checker for code. It found places where data doesn't match what the code expects, and a strict build refuses to finish until those are fixed.

How to fix it: paste this prompt into your AI builder

Fix prompt for Lovable, Bolt, Cursor, Replit, v0, Windsurf
My build fails with TypeScript errors. Run the type check (npx tsc --noEmit or the build) and fix each listed error properly: update types/interfaces to match the real data (e.g. regenerate Supabase types if the database changed), handle undefined/null cases, and fix wrong property names. Do NOT silence errors with 'any', @ts-ignore, or by disabling type checking in the build config. Only touch the files with errors.

If the AI can't fix it: manual steps

  1. If you use Supabase, ask the AI to regenerate the database types after you change tables.

Where this happens

Seen in these AI app builders and editors:

LovableBolt.newCursorReplitv0Windsurf

Sources

Related build errors

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