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canvas入门
canvas入门
xiaoxiao
2021-12-15
22
<!DOCTYPE html>
<
html
lang
=
"en"
>
<
head
>
<
meta
charset
=
"utf-8"
>
</
head
>
<
body
>
<
canvas
id
=
"demo"
width
=
"600px"
height
=
"600px"
>
你的浏览器不支持canvas,请升级浏览器
<!-- flash -->
</
canvas
>
<
script
>
window.onload =
function
()
{
var
canvas = document.getElementById(
'demo'
);
var
ctx = canvas.getContext(
"2d"
); ctx.moveTo(
100
,
100
);
//画笔移动到100,100
ctx.lineTo(
200
,
100
);
//画直线到200,100
ctx.lineTo(
100
,
200
);
//ctx.lineTo(100, 100);
ctx.closePath();
//闭合路径
//设置线宽
ctx.lineWidth =
4
; ctx.strokeStyle =
'rgba(233,233,233,.8)'
;
//设置描边样式
ctx.stroke();
//描边
ctx.fillStyle =
"blue"
; ctx.fill(); }
</
script
>
</
body
>
</
html
>
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