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monday-sdk-js 1.0.0-beta removes the server SDK, monday.api() and the itemIds event
monday.com has released v1.0.0-beta of monday-sdk-js with breaking changes: three long-deprecated features are removed, and from September 1, monday.com no longer supports issues with them.
Server-side GraphQL queries through mondaySdk({ token }) no longer work; apps need to switch to the official @mondaydotcomorg/api package. The client-side monday.api() method is removed as well, with the same migration path. The legacy monday.listen('itemIds') event is also gone: filtered item IDs on a board now have to be fetched through the GraphQL API directly.
The removals had been signaled with deprecation warnings before the release. monday.com offered help with migrations until September 1.
Source: monday.com in the monday developers community Slack