canvas-9NonZeroAroundPrinciples.html_html/css_WEB-ITnose

WBOY

Release： 2016-06-24 11:33:01

Original

997 people have browsed it

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>非零环绕原则</title></head><body>    <canvas id="canvas" style="margin:0 auto;border:1px #ddd solid">        The current browser does not support Canvas, can replace the browser a try!    </canvas>    <script>        window.onload = function(){            var canvas = document.getElementById('canvas');            canvas.width = 1024;            canvas.height = 768;            if(canvas.getContext('2d')){                var context = canvas.getContext('2d');                context.beginPath();                    context.arc(400,400,300,0,Math.PI*2,false);                    context.arc(400,400,150,0,Math.PI*2,true);                context.closePath();                context.fillStyle = "#058";                context.shadowColor = "gray";                context.shadowOffsetX = 10;                context.shadowOffsetY = 10;                context.shadowBlur = 10;                context.fill();            }else{                alert('当前游览器不支持Canvas，请更换游览器后再试！');            }        }    </script></body></html>

Copy after login

Related labels：

canvas-9NonZeroAroundPrinciples.html

source：php.cn

Previous article：使用css3画饼图_html/css_WEB-ITnose Next article：【原创】微信公众号与HTML 5混合模式揭秘4--jssdk调用微信扫一扫_html/css_WEB-ITnose

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn