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feat: reuse existing style elements in dev #12678

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merged 1 commit into from
Apr 5, 2023
Merged

feat: reuse existing style elements in dev #12678

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7 changes: 7 additions & 0 deletions packages/vite/src/client/client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -333,6 +333,13 @@ async function waitForSuccessfulPing(
}

const sheetsMap = new Map<string, HTMLStyleElement>()

// collect existing style elements that may have been inserted during SSR
// to avoid FOUC or duplicate styles
document.querySelectorAll('style[data-vite-dev-id]').forEach((el) => {
sheetsMap.set(el.getAttribute('data-vite-dev-id')!, el as HTMLStyleElement)
})
Comment on lines +339 to +341
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I think it would be good to add a comment here to help others understand this part. So we avoid the risk of someone deleting it as unneeded in the future

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Done!


// all css imports should be inserted at the same position
// because after build it will be a single css file
let lastInsertedStyle: HTMLStyleElement | undefined
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