質問編集履歴
1
コードを書き忘れてました
test
CHANGED
File without changes
|
test
CHANGED
@@ -27,3 +27,199 @@
|
|
27
27
|
|
28
28
|
|
29
29
|
windowLoadのイベント無しでbodyにfunctionも無しでscript直打ちしちゃって大丈夫なんでしょうか??
|
30
|
+
|
31
|
+
|
32
|
+
|
33
|
+
MDNのサイトのコードです
|
34
|
+
|
35
|
+
```javascript
|
36
|
+
|
37
|
+
<!DOCTYPE html>
|
38
|
+
|
39
|
+
<html>
|
40
|
+
|
41
|
+
<head>
|
42
|
+
|
43
|
+
<meta charset="utf-8" />
|
44
|
+
|
45
|
+
<title>Sample of MDN</title>
|
46
|
+
|
47
|
+
<style>* { padding: 0; margin: 0; }
|
48
|
+
|
49
|
+
canvas { background: #eee; display:
|
50
|
+
|
51
|
+
block; margin: 0 auto; }
|
52
|
+
|
53
|
+
</style>
|
54
|
+
|
55
|
+
</head>
|
56
|
+
|
57
|
+
<body>
|
58
|
+
|
59
|
+
|
60
|
+
|
61
|
+
<canvas id="myCanvas" width="480" height="320"></canvas>
|
62
|
+
|
63
|
+
|
64
|
+
|
65
|
+
<script>
|
66
|
+
|
67
|
+
var canvas = document.getElementById("myCanvas");
|
68
|
+
|
69
|
+
var ctx = canvas.getContext("2d");
|
70
|
+
|
71
|
+
ctx.beginPath();
|
72
|
+
|
73
|
+
ctx.rect(20, 40, 50, 50);
|
74
|
+
|
75
|
+
ctx.fillStyle = "#FF0000";
|
76
|
+
|
77
|
+
ctx.fill();
|
78
|
+
|
79
|
+
ctx.closePath();
|
80
|
+
|
81
|
+
ctx.beginPath();
|
82
|
+
|
83
|
+
ctx.arc(240, 160, 20, 0, Math.PI*2, false);
|
84
|
+
|
85
|
+
ctx.fillStyle = "green";
|
86
|
+
|
87
|
+
ctx.fill();
|
88
|
+
|
89
|
+
ctx.closePath();
|
90
|
+
|
91
|
+
ctx.beginPath();
|
92
|
+
|
93
|
+
ctx.rect(160, 10, 100, 40);
|
94
|
+
|
95
|
+
ctx.strokeStyle = "rgba(0, 0, 255, 0.5)";
|
96
|
+
|
97
|
+
ctx.stroke();
|
98
|
+
|
99
|
+
ctx.closePath();
|
100
|
+
|
101
|
+
</script>
|
102
|
+
|
103
|
+
|
104
|
+
|
105
|
+
</body>
|
106
|
+
|
107
|
+
</html>
|
108
|
+
|
109
|
+
|
110
|
+
|
111
|
+
```
|
112
|
+
|
113
|
+
|
114
|
+
|
115
|
+
Oreillyを参考にしたwindowLoadを使う書き方です
|
116
|
+
|
117
|
+
|
118
|
+
|
119
|
+
```javascript
|
120
|
+
|
121
|
+
<!DOCTYPE html>
|
122
|
+
|
123
|
+
<html lang="en">
|
124
|
+
|
125
|
+
<head>
|
126
|
+
|
127
|
+
<meta charset="UTF-8">
|
128
|
+
|
129
|
+
|
130
|
+
|
131
|
+
<title>EX2 seriesMDN</title>
|
132
|
+
|
133
|
+
|
134
|
+
|
135
|
+
<style>* { padding: 0; margin: 0; }
|
136
|
+
|
137
|
+
canvas { background: #eee; display:
|
138
|
+
|
139
|
+
block; margin: 0 auto; }
|
140
|
+
|
141
|
+
</style>
|
142
|
+
|
143
|
+
|
144
|
+
|
145
|
+
<script >
|
146
|
+
|
147
|
+
window.addEventListener('load', eventWindowLoaded, false);
|
148
|
+
|
149
|
+
|
150
|
+
|
151
|
+
function eventWindowLoaded() {
|
152
|
+
|
153
|
+
canvasApp();
|
154
|
+
|
155
|
+
}
|
156
|
+
|
157
|
+
function canvasApp() {
|
158
|
+
|
159
|
+
var theCanvas = document.getElementById("canvas");
|
160
|
+
|
161
|
+
var ctx = theCanvas.getContext("2d");
|
162
|
+
|
163
|
+
drawScreen();
|
164
|
+
|
165
|
+
function drawScreen() {
|
166
|
+
|
167
|
+
ctx.beginPath();
|
168
|
+
|
169
|
+
ctx.rect(20, 40, 50, 50);
|
170
|
+
|
171
|
+
ctx.fillStyle = "#FF0000";
|
172
|
+
|
173
|
+
ctx.fill();
|
174
|
+
|
175
|
+
ctx.closePath();
|
176
|
+
|
177
|
+
|
178
|
+
|
179
|
+
ctx.beginPath();
|
180
|
+
|
181
|
+
ctx.arc(240, 160, 20, 0, Math.PI*2, false);
|
182
|
+
|
183
|
+
ctx.fillStyle = "green";
|
184
|
+
|
185
|
+
ctx.fill();
|
186
|
+
|
187
|
+
ctx.closePath();
|
188
|
+
|
189
|
+
|
190
|
+
|
191
|
+
ctx.beginPath();
|
192
|
+
|
193
|
+
ctx.rect(160, 10, 100, 40);
|
194
|
+
|
195
|
+
ctx.strokeStyle = "rgba(0, 0, 255, 0.5)";
|
196
|
+
|
197
|
+
ctx.stroke();
|
198
|
+
|
199
|
+
ctx.closePath();
|
200
|
+
|
201
|
+
|
202
|
+
|
203
|
+
}
|
204
|
+
|
205
|
+
}
|
206
|
+
|
207
|
+
|
208
|
+
|
209
|
+
|
210
|
+
|
211
|
+
|
212
|
+
|
213
|
+
</script>
|
214
|
+
|
215
|
+
</head>
|
216
|
+
|
217
|
+
<body>
|
218
|
+
|
219
|
+
<canvas id="canvas" width="480" height="320">No canvas sup</canvas>
|
220
|
+
|
221
|
+
</body>
|
222
|
+
|
223
|
+
</html>
|
224
|
+
|
225
|
+
```
|