What should you do if you encounter a colleague who laughs immediately when you make a mistake? He also posted jokes to celebrate in the group,

It is obvious that there is something wrong with your character. He is gloating about your misfortune, or he may be jealous of you and wants you to make a fool of yourself. There is a high probability that this kind of person will become the one who adds insult to injury to you when you are in trouble. This kind of person completely ignores the feelings of the person involved and bases his own happiness on the embarrassment of others... It is strongly recommended to stay away from this kind of person