Comment: html5 canvas is very powerful to use its canvas to easily draw Bezier curves, which is convenient for everyone to use in the future. This is especially shared with the implementation code. Friends who have this need can refer to it.
View the effect:Complete code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Draw Bezier curves using html5's canvas canvas</title>
</head>
<body>
<div>
<a href="http://keleyi.com/a/bjac/j77m9131.htm" target="_blank">Original text</a></div>
<canvas></canvas>
<script type="text/javascript">
function draw(id)
{
var canvas=document.getElementById(id);
if(canvas==null)
return false;
var context=canvas.getContext('2d');
context.fillStyle="#eeeeff";
context.fillRect(0,0,400,300);
var n=0;
var dx=150;
var dy=150;
var s=100;
context.beginPath();
context.globalCompositeOperation='and';
context.fillStyle='rgb(100,255,100)';
context.strokeStyle='rgb(0,0,100)';
var x=Math.sin(0);
var y=Math.cos(0);
var dig=Math.PI/15*11;
for(var i=0;i<30;i++)
{
var x=Math.sin(i*dig);
var y=Math.cos(i*dig);
context.bezierCurveTo(dx+x*s,dy+y*s-100,dx+x*s+100,dy+y*s,dx+x*s,dy+y*s);
}
context.closePath();
context.fill();
context.stroke();
}
draw("keleyi_com");
</script>
</body>
</html>