Comments (3)
langpavel
commented on July 20, 2024
How to detect Immutable objects?
Under the hood this is possible because of special properties on prototype called sentinels:
@@__IMMUTABLE_INDEXED__@@@@__IMMUTABLE_ITERABLE__@@@@__IMMUTABLE_KEYED__@@@@__IMMUTABLE_LIST__@@@@__IMMUTABLE_MAP__@@@@__IMMUTABLE_ORDERED__@@@@__IMMUTABLE_SEQ__@@@@__IMMUTABLE_SET__@@@@__IMMUTABLE_STACK__@@
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mattzeunert
commented on July 20, 2024
From what I've found the only change that needs to be made is replacing instanceOf Immutable.Record. Everything else already uses the sentinels under the hood, so you can include the Immutable library in the bookmarklet, rather than depending on the one on the page.
It's not pure, but using record._defaultValues !== undefined to detect Records worked for me.
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langpavel
commented on July 20, 2024
@mattzeunert Actually, Record can be detected in this way:
const isRecord = o => !!(
o['@@__IMMUTABLE_KEYED__@@'] &&
o['@@__IMMUTABLE_ITERABLE__@@'] &&
o._defaultValues);from immutable-devtools.
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