很简单
var mySvg = document.querySelector(".mysvg");
var svgCon = mySvg.outerHTML;
//svg转base64;
alert(window.btoa(unescape(encodeURIComponent(svgCon))));
完整代码如下：
<!DOCTYPE html>
<html>
<head>
<title>svgAsHtml</title>
<meta charset="utf-8">
<script type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/d3.js"></script>
</head>
<body>
<svg width="300" height="170" class="mysvg" viewbox="0 0 300 170" xmlns="http://www.w3.org/2000/svg" version="1.1">
<path d="M100 10 L50 60 L150 60 Z" stroke="#FB716D" stroke-width="3" fill="#FBA28A" />
<rect x="55" y="61" width="90" height="100" fill="#F3C392"></rect>
<rect x="85" y="97" width="30" height="30" stroke="#f6f6f6" stroke-width="3" fill="#B2DBCB" />
<line x1="85" x2="115" y1="112" y2="112" stroke="#f6f6f6" stroke-width="3" fill="transparent" />
<line x1="100" x2="100" y1="97" y2="127" stroke="#f6f6f6" stroke-width="3" fill="transparent" />
<g transform="translate(150,-18)">
<path d="M 30 160 A 30 35, 0, 1, 1, 60 160 L 45 160 Z" fill="#7ACB9E"></path>
<rect x="40" y="160" width="10" height="22" fill="#EBBEA6" />
</g>
<g transform="translate(187,-18)">
<path d="M70 100 L40 160 L100 160 Z" fill="#7ACB9E" />
<rect x="65" y="160" width="10" height="22" fill="#EBBEA6" />
</g>
</svg>
<script type="text/javascript">
var mySvg = document.querySelector(".mysvg");
svgCon = mySvg.outerHTML;
//svg转base64;
href = 'data:image/svg+xml;base64,' + window.btoa(unescape(encodeURIComponent(svgCon)))
image = new Image();
image.src = href;
//添加svg转base64格式的图片
var svgImg = document.createElement('img');
svgImg.src = href;
document.body.appendChild(svgImg)
//下载svg图片
var svgLink = document.createElement('a');
svgLink.download = "image.svg";
svgLink.href = href;
svgLink.innerHTML = '下载svg图片'
document.body.appendChild(svgLink);
image.onload = function() {
var canvas = document.createElement('canvas');
canvas.width = image.width;
canvas.height = image.height;
var context = canvas.getContext('2d');
context.drawImage(image, 0, 0);
//svg转png的base64编码;
var imgDataUri = canvas.toDataURL('image/png');
console.log(imgDataUri);
//添加svg转base64格式的png图片
var pngImg = document.createElement('img');
pngImg.src = imgDataUri;
document.body.appendChild(pngImg)
//下载png图片
var a = document.createElement('a');
a.download = "image.png";
a.href = imgDataUri;
a.innerHTML = '下载png图片'
document.body.appendChild(a);
//svg转jpg的base64编码;
var jpgDataUri = canvas.toDataURL('image/jpeg', 1);
console.log(jpgDataUri)
//添加svg转base64格式的jpg图片
var jpgImg = document.createElement('img');
jpgImg.src = jpgDataUri;
document.body.appendChild(jpgImg)
//下载jpg图片
var a = document.createElement('a');
a.download = "image.jpeg";
a.href = jpgDataUri;
a.innerHTML = '下载jpg图片'
document.body.appendChild(a);
}
</script>
</body>
</html>
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