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DarrenPaulWright avatar DarrenPaulWright commented on June 16, 2024

First, JSON.stringify on a map will always produce "{}", no matter the contents. I have tests verifying that value and previous value are correct. In your console.log, if you instead used value.get('a') you would see the 'hello, world' on value.

Second, the path. Since you can't access the contents of a map with dot syntax, in your example _state.a is undefined, it was determined to just show the path to the map, not within it. Then you can extrapolate from the value, previousValue, and/or applyData what changed. In this case the applyData tells you exactly what changed.

from on-change.

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