facebook/lexical · error · Error

Minified Lexical error #${code}; visit ${url.toString()} for

Error message

Minified Lexical error #${code}; visit ${url.toString()} for the full message or use the non-minified dev environment for full errors and additional helpful warnings.

What it means

In production builds Lexical strips the human-readable text of its internal errors and throws a generic Error carrying only a numeric error code, to keep bundle size small. This message tells you the code and a URL (errors.lexical.dev with ?code= and ?v= query params) that renders the full original message with the arguments substituted. It is a thrown Error, not a warning, so it interrupts execution.

Source

Thrown at packages/lexical-internal/src/formatProdErrorMessage.ts:25

 */

// Do not require this module directly! Use normal `invariant` calls with
// template literal strings. The messages will be replaced with error codes
// during build.

export default function formatProdErrorMessage(
  code: string,
  ...args: string[]
): never {
  const url = new URL('https://lexical.dev/docs/error');
  const params = new URLSearchParams();
  params.append('code', code);
  for (const arg of args) {
    params.append('v', arg);
  }
  url.search = params.toString();

  throw Error(
    `Minified Lexical error #${code}; visit ${url.toString()} for the full message or use the non-minified dev environment for full errors and additional helpful warnings.`,
  );
}

View on GitHub (pinned to 76a22dcba9)

Solutions

Open the URL from the message (it includes the code and values) to see the full decoded error message.
Reproduce with a non-minified development build of Lexical (dev export condition / source) to get the full error and additional warnings.
Look up the numeric code in packages/lexical-shared/src/errorCodes (codes are appended at build time) to map it to the original message.
Fix the underlying invalid API usage once the full message is known.

Defensive patterns

Strategy: try-catch

Type guard

function isMinifiedLexicalError(e: unknown): e is Error & {message: string} {
  return e instanceof Error && e.message.startsWith('Minified Lexical error #');
}

Try / catch

try {
  editor.update(() => { /* ... */ });
} catch (e) {
  if (isMinifiedLexicalError(e)) {
    const code = /#(\d+)/.exec(e.message)![1];
    console.error(`Lexical error ${code}; see https://errors.lexical.dev?code=${code}`);
  } else {
    throw e;
  }
}

Prevention

Develop and test against non-minified dev builds so full error messages and warnings appear.
When a minified error appears in prod logs, resolve the code via the URL in the message or the error-codes file.
Register editor onError to capture and log errors with context (editor state) for diagnosis.
Never swallow Lexical-thrown errors — they indicate invalid API usage that will corrupt behavior.

When it happens

Trigger: Any Lexical internal invariant violation (invalid API usage, use of $-functions outside an update/read context, corrupt node trees, etc.) thrown via formatProdErrorMessage in a minified production build; the specific code identifies the actual invariant.

Common situations: Shipping minified prod bundles and hitting any Lexical-thrown error; debugging a crash whose only info is 'Minified Lexical error #NN'; CI/e2e runs against prod builds.

Related errors

AI-assisted analysis of facebook/lexical@76a22dcba9 (2026-08-31). Data as JSON: /api/errors/17d352358a238d21. Report an issue: GitHub.