<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"> <title>Canvas: Point In Path</title>
</head><body>
<canvas id="canvas"></canvas>
<script>
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
canvas.width = 600;
canvas.height = 400;
context.fillStyle = "#efefef";
context.fillRect(0, 0, canvas.width, canvas.height);
context.beginPath();
context.strokeStyle = "blue";
context.lineWidth = 3;
context.moveTo(30, 30);
context.lineTo(300, 300);
context.stroke();
context.closePath();
console.log(context.isPointInPath(30, 30)); // true
console.log(context.isPointInPath(100, 100)); // false
console.log(context.isPointInPath(300, 300)); // true
</script></body></html>
(100, 100)为什么判断不在path上，奇怪啊，是哪里遗漏了什么吗？
