SVG - Convert SVG polygon to path（转）

转：https://stackoverflow.com/questions/10717190/convert-svg-polygon-to-path

背景：

首先获取svg的图片素材，如：http://www.haotu.net/，找到自己需要的。

下载svg图标，编辑打开，会发现内部是"polygon"，而不是我们需要的path。

解决方法：

1. Open your SVG in a web browser.

2. Run this code:

var polys = document.querySelectorAll('polygon,polyline');
[].forEach.call(polys,convertPolyToPath);

function convertPolyToPath(poly){
  var svgNS = poly.ownerSVGElement.namespaceURI;
  var path = document.createElementNS(svgNS,'path');
  var pathdata = 'M '+poly.getAttribute('points');
  if (poly.tagName=='polygon') pathdata+='z';
  path.setAttribute('d',pathdata);
  poly.parentNode.replaceChild(path,poly);
}

3. Using the Developer Tools (or Firebug) of the browser, use "Copy as HTML" (or Copy SVG) on the element to get the modified source onto the clipboard.

4. Paste into a new file and enjoy.

Demo：

转换前：

<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
	 width="64px" height="64px" viewBox="0 0 64 64" enable-background="new 0 0 64 64" xml:space="preserve">
<g>
	<polygon fill="none" stroke="#000000" stroke-width="2" stroke-miterlimit="10" points="32,1 26,1 26,10 20,12 14,6 6,14 12,20 
		10,26 1,26 1,38 10,38 12,44 6,50 14,58 20,52 26,54 26,63 32,63 38,63 38,54 44,52 50,58 58,50 52,44 54,38 63,38 63,26 54,26 
		52,20 58,14 50,6 44,12 38,10 38,1 	"/>
	<circle fill="none" stroke="#000000" stroke-width="2" stroke-miterlimit="10" cx="32" cy="32" r="6"/>
</g>
</svg>

转换后：

<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="64px" height="64px" viewBox="0 0 64 64" enable-background="new 0 0 64 64" xml:space="preserve">
<g>
	<path d="M 32,1 26,1 26,10 20,12 14,6 6,14 12,20    10,26 1,26 1,38 10,38 12,44 6,50 14,58 20,52 26,54 26,63 32,63 38,63 38,54 44,52 50,58 58,50 52,44 54,38 63,38 63,26 54,26    52,20 58,14 50,6 44,12 38,10 38,1  z"/>
	<circle fill="none" stroke="#000000" stroke-width="2" stroke-miterlimit="10" cx="32" cy="32" r="6"/>
</g>
</svg>