Refactor Legacy Frontend | Dataford Interview Questions

Explain how you would refactor a legacy component to improve its maintainability and performance.

For this coding exercise, represent the component as a nested dictionary and return visible component IDs in preorder. Invisible components and their entire subtrees must be skipped; preserve the original child order.

Signature: visible_component_ids(component)

The input contains id, visible, and optional children fields. Return a list of visible IDs.

Constraints

1 <= number of component nodes <= 10^4
Each node has a unique string ID
Each node contains a boolean visible field
The children field is omitted or contains a list of component dictionaries
The component tree contains no cycles

Function Signature

def visible_component_ids(component):

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