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18 lines
624 B
Plaintext
18 lines
624 B
Plaintext
---
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title: No Unwanted Polyfill.io
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---
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> Prevent duplicate polyfills from Polyfill.io.
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## Why This Error Occurred
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You are using polyfills from Polyfill.io and including polyfills already shipped with Next.js. This unnecessarily increases page weight which can affect loading performance.
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## Possible Ways to Fix It
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Remove all duplicate polyfills. If you need to add polyfills but are not sure if Next.js already includes it, take a look at the list of [supported browsers and features](/docs/architecture/supported-browsers).
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## Useful Links
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- [Supported Browsers and Features](/docs/architecture/supported-browsers)
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