为什么不能填充red颜色

<!DOCTYPE html>

<html>

<head>

</head>

<body>

window.onload=function(){

var canvas=document.getElementById("canvas");

canvas.width=800;

canvas.height=800;

var context=canvas.getContext("2d");

context.beginPath();

context.moveTo(100,100);

context.lineTo(700,700);

context.lineTo(100,700);

context.closePath();

context.lineWidth=10;

context.fillStyle="red";

context.strokeStyle="#058";

context.stroke();

ontext.fill();

}

</script>

</body>

</html>

逆水行

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