​x
 
<!DOCTYPE html>
<html>
<body>
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<h1>HTML5 Canvas</h1>
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<h2>lineCap 属性</h2>
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<canvas id="myCanvas" width="200" height="100" style="border:1px solid grey;"></canvas>
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<script>
const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");
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ctx.moveTo(0,0);
ctx.lineTo(175,75);
ctx.lineWidth = 10;
ctx.lineCap = "round";
ctx.stroke();
</script>
​
</body>
</html>
​