StevenandGitHub 1a8ad14089 Rename next/image dangerously-unoptimized to custom and warn when applicable (#26998) ...

Since we are no longer accepting new built-in loaders, users may wish to use a different cloud provider.

So this PR renames `dangerously-unoptimized` to `custom` to handle this case as well as the intention of `next export`.

If the user doesn't add a `loader` prop, we throw an error.
If the user adds a `loader` prop but it doesn't return the width, we print a warning.

- Follow up to #26847 
- Fixes #21079 
- Fixes #19612 
- Related to #26850

2021-07-08 19:35:19 +00:00

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index.js

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