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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>慕課網(wǎng)Wiki</title>
<style>
#imooc{
border:1px solid #ccc;
}
</style>
</head>
<body>
<canvas id="imooc">您的瀏覽器不支持 HTML5 canvas 標(biāo)簽</canvas>
<script>
const canvas = document.getElementById('imooc');
const ctx = canvas.getContext('2d');
ctx.lineWidth = 20;
ctx.strokeStyle = "#456795"
ctx.beginPath();
ctx.moveTo(30,30);
ctx.lineTo(200,30);
ctx.lineCap = "butt"; // 設(shè)置了lineCap屬性值為 butt
ctx.stroke();
ctx.beginPath();
ctx.moveTo(30,80);
ctx.lineTo(200,80);
ctx.lineCap = "round"; // 設(shè)置了lineCap屬性值為 round
ctx.stroke();
ctx.beginPath();
ctx.moveTo(30,130);
ctx.lineTo(200,130);
ctx.lineCap = "square"; // 設(shè)置了lineCap屬性值為 square
ctx.stroke();
//下面畫兩個基準(zhǔn)線方便觀察
ctx.lineWidth = 1;
ctx.strokeStyle = "red";
ctx.beginPath();
ctx.moveTo(30,0);
ctx.lineTo(30,180);
ctx.moveTo(200,0);
ctx.lineTo(200,180);
ctx.stroke();
</script>
</body>
運行結(jié)果