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29 lines
861 B
Plaintext
29 lines
861 B
Plaintext
---
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title: Missing webpack config
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---
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## Why This Error Occurred
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The value returned from the custom `webpack` function in your `next.config.js` was undefined. This can occur from the initial config value not being returned.
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## Possible Ways to Fix It
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Make sure to return the `webpack` config from your custom `webpack` function in your `next.config.js`
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```js filename="next.config.js"
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module.exports = {
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webpack: (config, { buildId, dev, isServer, defaultLoaders, webpack }) => {
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// Note: we provide webpack above so you should not `require` it
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// Perform customizations to webpack config
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config.plugins.push(new webpack.IgnorePlugin(/\/__tests__\//))
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// Important: return the modified config
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return config
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},
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}
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```
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## Useful Links
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- [Custom webpack config Documentation](/docs/pages/api-reference/config/next-config-js/webpack)
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