Tic Tac Toe (AI) Single Player Game(Javascript)

Hello friends, this is my new game Tic Tac Toe single player. Earlier we used to have tic tac toe multiplayer , but it is for single person. Here computer applies artificial intelligence and guesses the optimal move. Although this is not the best technique it is better than adhoc open the link for code and images https://drive.google.com/open?id=1bw1uV-LhnfoU2ekGJkdMs0ebVekDWm3q