我有一个 Svg img ，其中包含base64格式并尝试更改其颜色。有人知道如何执行此操作吗？我发现了一些关于<path>元素，但要注意以下事实：svgimg 位于base64字符串我不知道如何使用它。谁能帮助我或指出我正确的方向？
<img src="data:image/svg+xml;base64,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">
由于您没有澄清是否无法修改原始文件或者是否必须在客户端进行修改，我建议
以编程方式方法：
- 查找
<img>
- From
img.src strip "data:image..."，提取 Base64 编码的 SVG。
- 使用解码它atob https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64.atob
- 创建一个元素，只是为了查找
<path>
- 设置路径填充。
- 追加新图像或替换当前图像。
Example:
// Lookup the <img> by Id
var img = document.getElementById("target");
// Strip "data:image/svg+xml;base64," to get encoded SVG
var encoded = img.src.substring(26);
// Decode base64
var decoded = atob(encoded);
// Create an HTML element from decoded SVG
var wrapper = document.createElement('div');
wrapper.innerHTML = decoded;
var newSvg = wrapper.firstChild;
// Lookup the <path> and get a ref
var innerPath = newSvg.getElementsByTagName('path')[0];
// Set up new color
innerPath.setAttribute("fill", "#FF0000");
// Show modified image
document.body.appendChild(newSvg);
<img id="target" src="data:image/svg+xml;base64,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">
Note:
IE
我可以使用atob吗？ http://caniuse.com/#feat=atob-btoa
编辑：多重路径方法
var paths = newSvg.getElementsByTagName('path');
[].forEach.call(paths, function(path) {
path.setAttribute("fill", "#FF0000");
});
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