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fix: reload on restart with middleware mode (fixes #9038) #9040

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3 changes: 2 additions & 1 deletion packages/vite/src/client/client.ts
Expand Up @@ -294,7 +294,8 @@ async function waitForSuccessfulPing(hostAndPath: string, ms = 1000) {
try {
// A fetch on a websocket URL will return a successful promise with status 400,
// but will reject a networking error.
await fetch(`${location.protocol}//${hostAndPath}`)
// When running on middleware mode, it returns status 426, and an cors error happens if mode is not no-cors
await fetch(`${location.protocol}//${hostAndPath}`, { mode: 'no-cors' })
break
} catch (e) {
// wait ms before attempting to ping again
Expand Down