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add info regarding updating webpack versions #459

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add info regarding updating webpack versions #459

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4 changes: 4 additions & 0 deletions docs/troubleshooting.md
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Expand Up @@ -54,6 +54,10 @@ There are multiple ways to fix this depending on your setup. One way is to set [

`offline-plugin` can cache resources served from a CDN, given the correct configuration. Make sure the resources are served with the correct headers.

#### Updates are not being applied after upgrading from webpack 3 to 4

Since `offline-plugin` updates files based on their hashed chunk names, make sure they are exactly the same before and after upgrading webpack versions. (see original question and answer on [SO](https://stackoverflow.com/questions/57339054/clear-cache-on-current-users-device-in-migrating-from-webpack-3-to-4))

#### DOMException: Failed to register a ServiceWorker: The script has an unsupported MIME type ('text/html') Error

Make sure your webserver is serving your assets (including `sw.js`) with the correct mime type. Also, make sure you are using relative / absolute paths correctly (see the [`FAQ`](FAQ.md) regarding this). Also make sure that ServiceWorker and/or AppCache files are generated into the correct folder. You may use `ServiceWorker.output` and `AppCache.output` to change the output path. See [options](options.md) for details.
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