When React encounters two elements of different types during the reconciliation process, it will ________ the old tree and build a new one from scratch.

  • Append to the existing tree
  • Ignore the elements and continue
  • Unmount and replace
  • Update the old tree
When React encounters two elements of different types during the reconciliation process, it will "Unmount and replace" the old tree and build a new one from scratch. This approach ensures that the new elements are created and inserted correctly in the virtual DOM and the actual DOM, maintaining consistency in the UI.
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