V0211

Components · thrown by @voltdev/core (component.ts)

A development build says:

Unknown component <‹tag›> used by ‹name›. Add it to that component's imports, or define it as a custom element before the component mounts.

The parts in ‹guillemets› are filled in from your program when it happens.

In a production build

The sentence above is not in a production bundle — it would cost every application the bytes of every message whether or not it ever failed. What a production build keeps is the code, what failed, and the link to this page, so the same error there reads:

[volt] V0211 tag=‹tag› https://voltjs.dev/e/V0211

and carries code ('V0211') and detail ({ tag }) as fields, so a reporter can group by them without reading the text. See Errors for how an error is shaped, and the diagnostics option of the Vite plugin for a build that wants only the code.

Every error code