<!DOCTYPE html>
<html>
<body>
<canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.
</canvas>
<script>
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.rect(20,20,150,100);
if (ctx.isPointInPath(20,50)) //如果点 20,50 位于当前路径中,则绘制一个矩形(只要该点位于矩形的边上,就绘制图形)
{
ctx.stroke();
};
</script>
</body>
</html>
时间: 2024-08-11 03:38:07