HTML制作五子棋上代码<html> <head> <meta name="viewport" content="width=device-width, initial-scale=0.7"> <meta charset="utf-8"> <title>源技五子棋</title> <style type="text/css"> canvas { display: block; margin: 50px auto; box-shadow: -2px -2px 2px #efefef, 5px 5px 5px #b9b9b9;