How to remove a line from a file above or below a searched value?

Question

bash

The command deletes the line with the value (pattern)
sed '/pattern/d' file.txt
How to delete the line above and below the line with the given value, but leave the searched line intact? (in separate commands)
Maybe some other utility is needed?

Answer 1

Try to reverse the text and remove the line below
tac file.txt | sed '/pattern/{n;d;}' | tac