#deterministic

d3.js Key Function Default Identity Behavior Lacks Deterministic Constraint

d3.js applies a default key function that uses strict equality (===) on the datum value, treating each object's identity solely by its value. When the data array is reordered, filtered, or mapped, distinct objects may yield the same key, causing the join to mistakenly merge them and produce unintended enter or exit transitions. Developers seek a deterministi

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