Frontend Frontend Developer interview questions

I didn't not complete the interview because someone(interviewer) asked a question it was not difficult but I didn't not remember the syntax where it was basic question ... So the manger not the person who asked the question, said to me to search for it. When I opened browser for search, he inturapted me and told me I did not waiting you to get syntax. After a while He laughed sarcastically. As a result, I told him I couldn't continue in this interview which hold any kind of respect even if I couldn't answer the question.