html 5 canvas使用--直線を描画
1293 ワード
<!DOCTYPE html>
<Html>
<head>
<meta charset="UTF-8"/>
<script>
function drawLine(){
// canvas
var canvas=document.getElementById("drawLine");
var context=canvas.getContext('2d');
//
context.beginPath();
//
context.moveTo(70,140);
//
context.lineTo(140,70);
//
context.stroke();
}
window.addEventListener("load",drawLine,true);
</script>
</head>
<title>html5 </title>
<body>
<div id="info"></div>
<canvas id="drawLine" style="border:1px solid;width:200px;height:200px;"></canvas>
<script>
// HTML5
try{
document.createElement("canvas").getContext("2d");
document.getElementById("info").innerHTML=" HTML5";
}catch(e){
document.getElementById("info").innerHTML=" HTML5"
}
</script>
</body>
</Html>