<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body{background: #131115;}
#c1{background: #fbf7fe;}
</style>
<script>
window.onload=function(){
var oC=document.getElementById('c1');
var oGC=oC.getContext('2d');
oGC.moveTo(100,200);
oGC.arcTo(100,100,300,200,50);
oGC.stroke();
}
</script>
</head>
<body>
<canvas id="c1" width="500" height="500"><!-- 默认宽300； 高150 -->
<span>不支持camvas浏览器</span>
</canvas>
</body>
</html>
第2中写法
window.onload=function(){ var oC=document.getElementById('c1'); var oGC=oC.getContext('2d'); oGC.moveTo(100,200); /*oGC.arcTo(100,100,300,200,50);*/ oGC.quadraticCurveTo(100,100,200,100); oGC.stroke(); }
第3中写法
window.onload=function(){ var oC=document.getElementById('c1'); var oGC=oC.getContext('2d'); oGC.moveTo(100,200); /*oGC.arcTo(100,100,300,200,50);*/ /*oGC.quadraticCurveTo(100,100,200,100);*/ oGC.bezierCurveTo(100,100,200,200,200,100); oGC.stroke(); }
