Vite · Workers
VITE0021Use Vite's static worker URL pattern
Checks that Vite worker code includes the worker URL pattern needed for predictable behavior.
vite-doctor/viteworkerswarnNo fix
Why it happens
Vite configuration runs in both dev and build pipelines. Narrow, explicit settings reduce surprises across SSR, workers, and local file access.
Fix
Add worker URL pattern where Vite expects it, close to the code that depends on it.
Example
Use Vite worker URL pattern
Before
const worker = new Worker('./worker.ts')
After
const worker = new Worker(new URL('./worker.ts', import.meta.url), { type: 'module' })
Verify the fix
Run only this rule after editing so the report stays focused on the diagnostic you are closing:
pnpm vite-doctor . --framework vite --rules vite/worker/require-worker-url-pattern