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by wruza
1686 days ago
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Keys are also essential to retaining an element identity, which is structurally more important than performance, because 1) code may have a reference to an element and think that it relates to some data, 2) an element may have an explicit state (like focused, animating, etc). Keys are a hugely leaking abstraction, but are inevitable when you bridge a declarative immediate mode rendering into a stateful one. |
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