<!DOCTYPE?html>
<html>
<head>
<meta?charset="UTF-8">
<title></title>
</head>
<body>
<canvas?id="canvas"?width="1024"?height="768"?style="border:?1px?solid?aqua;display:block;margin:auto">當前瀏覽器不支持，請更換瀏覽器</canvas>
<script>
window.onload=function(){
var?canvas?=document.getElementById("canvas");
var?context?=canvas.getContext("2d");
context.lineWidth=3;
context.strokeStyle="black";
for(var?i=0;i<10;i++){
context.beginPath();
context.arc(50+i*100,60,40,2*Math.PI*(i+1)/10);
context.closePath();
context.stroke();
}
}
</script>
</body>
</html>也沒提示有啥錯誤，但網(wǎng)頁不顯示圓，只有大框
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