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errors: added changeset for new assertion helpers

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Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
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Patrik Oldsberg
2021-10-07 12:17:33 +02:00
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.changeset/real-mice-beg.md
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'@backstage/errors': patch
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Two new helpers have been added that make it easier to migrate to considering thrown errors to be of the type `unknown` in TypeScript. The helpers are `assertError` and `isError`, and can be called to make sure that an unknown value conforms to the shape of an `ErrorLike` object. The `assertError` function is a type-guard that throws in the case of a mismatch, while `isError` returns false.