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Error: UMD and IIFE output formats are not supported for code-splitting builds. #59

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ralyodio opened this issue Mar 16, 2020 · 2 comments
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Error: UMD and IIFE output formats are not supported for code-splitting builds. #59

ralyodio opened this issue Mar 16, 2020 · 2 comments
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@ralyodio
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Error: UMD and IIFE output formats are not supported for code-splitting builds.

get this error.
@kaisermann
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kaisermann commented Mar 16, 2020 •
edited

This is not a svelte-i18n issue. The IIFE and UMD formats are self-contained by definition, you can't export/import pieces of other UMD/IIFE because its contents are fully enclosed.

If you're using rollup, which I assume you are, you have to use the ESM, AMD, or SystemJS format. Webpack doesn't have this problem because it has its runtime to replicate the import/export environment.

@kaisermann kaisermann added the invalid This doesn't seem right label Mar 16, 2020
@vvdt
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vvdt commented Sep 28, 2022

Adding this for other people that end up here after a google search, the following solution solved it for me:
https://stackoverflow.com/questions/64679496/svelte-import-dependency-package-with-error

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