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Question1 answer2,975 followingPosted 12 Jul 2021, 22:45 UTC109.7K views4,118 votes

PureComputed or Computed with deferEvaluation: Choosing the Right Approach for Automatic Disposal in Complex Dependency Chains

Goal Determine the optimal strategy for derived values that participate in deep dependency graphs while ensuring that subscriptions are cleaned up automatically when no longer needed. Constraints & Uncertainty PureComputed (introduced in Knockout 3.5) automatically disposes when all subscriptions are removed, but the documentation offers no clear guidanc

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disposal

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Question1 answer4,910 followingPosted 23 Jul 2020, 14:09 UTC121.9K views4,525 votes

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Unable to process binding error when async observable disposes mid-update

When a custom binding handler initiates asynchronous work (e.g., a throttled observable or a deferred extender), the developer must ensure that any pending notifications or timers are cancelled if the bound DOM node is removed by Knockout. The framework offers ko.utils.domNodeDisposal.addDisposeCallback for cleanup, but it does not automatically dispose ko.c

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cancellation disposal

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