I have an online friend who's battling depression and getting it treated but she's constantly entertaining ideas of suicide.
Just now she asked for my opinion in something and she said that "a very dear friend" told her they hate the idea of holding back someone who doesn't want to live anymore and then she suggested to give her a book with a bookmark to a page explaining how to commit suicide in a way where failure is impossible. My friend asked if her friend did this out of love and consideration, she said that her friend asked if she wanted to read the book and she said yes but it was still the friend who suggested the whole thing.
Now I have never had depression or any suicidal thoughts before, nor do I know anyone irl who did so I don't know how to handle this in an effective way. I love this girl a lot and she's still very young and she's really kind and funny and I'm sure deep inside she wants to be helped out of this darkness, otherwise she wouldn't have asked my opinion on this. I tried to remind her of all of her good qualities and I outright told her this was a very bad "advice" but she asked whether I thought so because I don't share the sentiment of letting go of someone who's no longer willing to live and now I don't know what to tell her, like hell I'd share that sentiment but I don't know if telling her that would come off as insensitive.