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Frontend Performance Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
Frontend Performance
In the implement-it-yourself getVisibleRange function, what is 'overscan' for?
A
It has no real purpose, just extra code
B
Rendering a few extra rows beyond the strictly-visible area to avoid a visible blank flash during fast scrolling, before the next range recalculation catches up
C
It determines the total number of items in the list
D
It controls the color of the visible rows
Check Answer