What does TS18048 mean?

The value is possibly undefined. Strict mode noticed an optional chain, array index or Map.get that can be undefined. Add a guard instead of assuming it exists.

How do I fix 'Object is possibly undefined'?

Guard it with an if check, use optional chaining, or throw early after find(). Only use the non-null assertion (!) when you can prove it is defined.

What does TS2307 cannot find module mean?

The import path is wrong, the file does not exist, or the package has no types. Fix the relative path, or add a declare module shim for untyped packages.

Why do I get TS errors only in strict mode?

Strict mode turns on checks like strictNullChecks and noImplicitAny that catch real bugs. The fixes here assume strict is on, which is the recommended setup.

Is this decoder free?

Yes, completely free, and it runs entirely in your browser with nothing uploaded.

TS Error Decoder - Interactive Lab | IconVault

Q: What does TS2322 mean?

Type X is not assignable to type Y: you handed a value to a spot expecting a different shape. Read the two types in the message, the first is what you gave, the second is what was wanted, then convert or widen the target type.

Paste any TypeScript error code and get a plain-English explanation with a copyable fix. Free, in-browser.

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TS Error Decoder

Plain-English TypeScript error fixes

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40 common error codes in the built-in database, no network needed. Showing 40.

TS1005

';' expected

The parser hit something it did not expect, usually a missing comma, bracket or semicolon on the line above. The real mistake is often one line earlier than the squiggle.

Typical trigger

const user = { name: "Ava" age: 30 };

The fix

// Add the missing comma:
const user = { name: "Ava", age: 30 };

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About this tool

IconVault's TS Error Decoder translates cryptic compiler messages into plain English. Search 40 common error codes like TS2322, TS2345 or TS18048, read why TypeScript is complaining in human terms, see a typical trigger, and copy the fix. The whole database lives in the page, so it works offline and instantly.

Everything is free and runs fully in your browser: no signup, no pasted code ever leaves your device. Type just the number (2322), a code (TS2322), or describe the problem (not assignable) and the decoder finds it.

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TS Error Decoder - Interactive Lab | IconVault

TS Error Decoder

';' expected

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