<!DOCTYPE html>
<html>
<head>
<script>

function boom()
{
  var ctx = document.querySelector("canvas").getContext('2d');
  ctx.lineTo(0, 3);
  ctx.moveTo(0, 1);
  ctx.isPointInPath(0, 2);
}

</script>
</head>
<body onload="boom();"><canvas width="100" height="100"></canvas></body>
</html>