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@ -213,7 +213,7 @@ For instance:
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```smart header="Historical notes"
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For historical reasons, methods `toString` or `valueOf` *should* return a primitive: if any of them returns an object, then there's no error, but that object is ignored (like if the method didn't exist).
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In contrast, `Symbol.toPrimitive` *must* return an primitive, otherwise there will be an error.
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In contrast, `Symbol.toPrimitive` *must* return a primitive, otherwise, there will be an error.
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```
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## Summary
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