如何将样式应用到嵌入式SVG？ [英] How to apply a style to an embedded SVG?

问题描述

当使用< svg> 标签直接将SVG包含在文档中时，可以通过文档的样式表将CSS样式应用于SVG。但是，我试图应用一个样式到嵌入的SVG（使用< object> 标签）。

When an SVG is directly included in a document using the <svg> tag, you can apply CSS styles to the SVG via the document's stylesheet. However, I am trying to apply a style to an SVG which is embedded (using the <object> tag).

是否可以使用下列程式码？

Is it possible to use anything such as the following code?

object svg { 
    fill: #fff; 
}

推荐答案

样式不适用于文档边界。

Short answer: no, since styles don't apply across document boundaries.

但是，由于您有一个< object> 使用脚本将样式表插入svg文档。

However, since you have an <object> tag you can insert the stylesheet into the svg document using script.

这样的代码假设< object> 已完全载入：

Something like this, and note that this code assumes that the <object> has loaded fully:

var svgDoc = yourObjectElement.contentDocument;
var styleElement = svgDoc.createElementNS("http://www.w3.org/2000/svg", "style");
styleElement.textContent = "svg { fill: #fff }"; // add whatever you need here
svgDoc.getElementById("where-to-insert").appendChild(styleElement);

也可以插入< link> 元素引用外部样式表：

It's also possible to insert a <link> element to reference an external stylesheet:

var svgDoc = yourObjectElement.contentDocument;
var linkElm = svgDoc.createElementNS("http://www.w3.org/1999/xhtml", "link");
linkElm.setAttribute("href", "my-style.css");
linkElm.setAttribute("type", "text/css");
linkElm.setAttribute("rel", "stylesheet");
svgDoc.getElementById("where-to-insert").appendChild(linkElm);

另一种选择是使用第一种方法插入一个样式元素，导入规则，例如 styleElement.textContent =@import url（my-style.css）。

Yet another option is to use the first method, to insert a style element, and then add an @import rule, e.g styleElement.textContent = "@import url(my-style.css)".

当然你也可以从svg文件直接链接到样式表，而不需要做任何脚本。以下任一项都应该有效：

Of course you can directly link to the stylesheet from the svg file too, without doing any scripting. Either of the following should work:

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="my-style.css" type="text/css"?>
<svg xmlns="http://www.w3.org/2000/svg">
  ... rest of document here ...
</svg>

或：

<svg xmlns="http://www.w3.org/2000/svg">
  <defs>
    <link href="my-style.css" type="text/css" rel="stylesheet" 
          xmlns="http://www.w3.org/1999/xhtml"/>
  </defs>
  ... rest of document here ...
</svg>

2015年更新：您可以使用 jquery-svg plugin for apply js scripts and css styles to an embedded SVG。

Update 2015: you can use jquery-svg plugin for apply js scripts and css styles to an embedded SVG.

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