有没有办法给一个内联SVG一个alt标签？这里是我的内联SVG的代码，但没有显示alt标记（我甚至不确定在联机搜索澄清后，我对alt标记的编码方式是否有效）：
<svg version="1.1" id="svg-header-filter" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="27px" height="27px" viewBox="0 0 37 37" enable-background="new 0 0 37 37" xml:space="preserve" alt="Hello world!">
<path class="header-filter-circle" d="M17.796,0C7.947,0,0,7.988,0,17.838s7.947,17.787,17.796,17.787c9.848,0,17.829-7.935,17.829-17.783 C35.625,7.988,27.644,0,17.796,0z"/>
<g>
<path class="header-filter-icon" fill="#FFFFFF" d="M15.062,30.263v-9.935l-8.607-8.703h22.343l-8.744,8.727v5.029L15.062,30.263z M8.755,12.625l7.291,7.389 v7.898l3.025-2.788v-5.086l7.426-7.413H8.755z"/>
</g>
</svg>
这是J小提琴：http://jsfiddle.net/FsCMM
最佳答案
应该使用标题元素而不是alt标记来显示工具提示：
<svg version="1.1" id="svg-header-filter" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="27px" height="27px" viewBox="0 0 37 37" enable-background="new 0 0 37 37" xml:space="preserve">
<title>Hello world!</title>
<path class="header-filter-circle" d="M17.796,0C7.947,0,0,7.988,0,17.838s7.947,17.787,17.796,17.787c9.848,0,17.829-7.935,17.829-17.783 C35.625,7.988,27.644,0,17.796,0z"/>
<g>
<path class="header-filter-icon" fill="#FFFFFF" d="M15.062,30.263v-9.935l-8.607-8.703h22.343l-8.744,8.727v5.029L15.062,30.263z M8.755,12.625l7.291,7.389 v7.898l3.025-2.788v-5.086l7.426-7.413H8.755z"/>
</g>
</svg>
对于chrome34：用g元素包装图形，并在此插入title元素。
<svg version="1.1" id="svg-header-filter" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="27px" height="27px" viewBox="0 0 37 37" enable-background="new 0 0 37 37" xml:space="preserve">
<g>
<title>Hello world!</title>
<path class="header-filter-circle" d="M17.796,0C7.947,0,0,7.988,0,17.838s7.947,17.787,17.796,17.787c9.848,0,17.829-7.935,17.829-17.783 C35.625,7.988,27.644,0,17.796,0z"/>
<g>
<path class="header-filter-icon" fill="#FFFFFF" d="M15.062,30.263v-9.935l-8.607-8.703h22.343l-8.744,8.727v5.029L15.062,30.263z M8.755,12.625l7.291,7.389 v7.898l3.025-2.788v-5.086l7.426-7.413H8.755z"/>
</g>
</g>
</svg>
关于html5 - 内联SVG可以使用Alt标签吗？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/23146570/