HTMLpractice/Day1.html at master · orcarex/HTMLpractice · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
<!DOCTYPE html>
<html>
   <head>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body{
            background-color: azure;

        }
        canvas{
            background-color: pink;
            position: absolute;
            left: 0;
            right: 0;
            top: 0;
            bottom: 0;
            margin: auto;
        }
    </style>
</head>
<body>

    <canvas width="400" height="400"></canvas>

</body>
    <script type="text/javascript">
        window.onload=function(){

            var canvas = document.querySelector("canvas");

            if(canvas.getContext){

                var ctx = canvas.getContext("2d");

            }

        }
    </script>
</html>