| </td>
<td>short, brief descriptions</td>
<td>simple, widely supported</td>
<td>limited in length</td>
</tr><tr><td>aria-label</td>
<td>brief descriptions</td>
<td>quick, inline</td>
<td>best for short text</td>
</tr><tr><td>aria-labelledby</td>
<td>complex descriptions using <title> and <desc></td>
<td>comprehensive, flexible</td>
<td>more verbose</td>
</tr><tr><td><figcaption></td>
<td>visible description in a figure context</td>
<td>visible and accessible</td>
<td>not ideal for all svgs</td>
</tr></tbody></table></div>
<h3>
功能图像
</h3>
<ul><li><p>任何具有功能性目的的图像（例如，链接到主页的徽标、用作搜索按钮的放大镜图标）都应包含适当的替代文本。</p></li>
<li><p>替代文本应描述<strong>图像的操作</strong>，而不是其视觉方面。</p></li>
<li><p>如果图像既提供信息又具有可操作性，您可以为每个元素添加替代描述 - 但这不是必需的。例如<br></p></li>
</ul><pre class="brush:php;toolbar:false"><div title="navigate to the homepage">
<a href="/">
<img src=".../ladybug_logo.png" alt="lovely ladybugs for your lawn"/>
</a>
</div>
</pre>
<h3>
复杂图像
</h3>
<ul><li><p>如果图像需要比装饰性、信息性或功能性图像更多的解释（包括信息图表、地图、图形/图表和复杂插图），请使用这些方法中的任何一种来添加替代描述</p></li>
<li><p>链接到资源或提供跳转链接到页面稍后的较长说明。例如<br></p></li>
</ul><pre class="brush:php;toolbar:false"><img src=".../ladybug_anatomy.svg" alt="diagram of the anatomy of a ladybug.">
<a href="ladybug-science.html">learn more about the anatomy of a ladybug</a>
</pre>
<ul><li>将 aria-scribedby 属性附加到 <img> 元素，然后将图像链接到包含较长描述的 id。例如
</li>
</ul><pre class="brush:php;toolbar:false"> <img src=".../ladybug_anatomy.svg" alt="diagram of the anatomy of a ladybug."
aria-describedby="description">
<p id="description">in this course, you will learn more about the
anatomy of a ladybug, including the head,
antenna, eye, pronotum, elytra, leg, abdomen, and wing.
</p>
</pre>
<ul><li>将简短的替代描述与较长的描述分组是使用 <figure> 和 <figcaption> 元素。例如
</li>
</ul><pre class="brush:php;toolbar:false"> <figure role="group">
<img src=".../Ladybug_Anatomy.svg" alt="Diagram of the anatomy of a
ladybug.">
<br><br>
<figcaption>
<a href="ladybug-science.html">Learn more about the anatomy of a
ladybug</a>
</figcaption>
</figure>
</pre>
<h3>
替代文本最佳实践
</h3>
<ul><li><p>建议将替代文本限制在 150 个字符或更少，以避免读者疲劳。</p></li>
<li><p>避免在说明中使用 <strong>“图像”</strong> 或 <strong>“照片”</strong> 等词语，因为屏幕阅读器会识别这些文件类型。</p></li>
<li><p>命名图像时，尽可能保持一致和准确。当替代文本丢失或被忽略时，图像名称是后备。</p></li>
<li><p>避免使用非字母字符（例如 #、9、&）</p></li>
<li><p>在图像名称或替代文本中使用单词之间的破折号，而不是下划线。</p></li>
<li><p>尽可能使用正确的标点符号。如果没有它，图像描述听起来就像是一个漫长的、永无休止的连续句子。</p></li>
<li><p>像人类而不是机器人一样编写替代文本。关键字堆砌对任何人都没有好处——使用屏幕阅读器的人会感到恼火，搜索引擎算法会惩罚他们。</p></li>
</ul><p>今天关于《无障碍 (a) 规则 - 3》的内容介绍就到此结束，如果有什么疑问或者建议，可以在golang学习网公众号下多多回复交流；文中若有不正之处，也希望回复留言以告知！</p> </div>
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<img src="/captcha.html" width="100" height="45" onclick="this.src = '/captcha.html?r=' + Math.random();"/>
</span>
</div>
<div class="loginBtn">
<button type="submit">注册</button>
</div>
</form>
</div>
</div>
</div>
<div class="beforeLoginTip">登录即同意 <a href="https://www.17golang.com/about/3.html" target="_blank" class="aBlue" title="用户协议">用户协议</a> 和 <a href="https://www.17golang.com/about/4.html" target="_blank" class="aBlue" title="隐私政策">隐私政策</a></div>
</div>
<!-- 重置密码 -->
<div class="loginInfo passwordForget">
<div class="closeIcon" onclick="$('.popupBg').hide();"></div>
<div class="returnLogin cursorPointer" onclick="$('.passwordForget').hide();$('.passwordLogin').show();">返回登录</div>
<div class="passwordInfo">
<ul class="logintabs selfTabMenu">
<li class="selfTabItem">重置密码</li>
</ul>
<div class="selfTabContBox">
<div class="selfTabCont">
<form id="resetpwd-form" class="form-horizontal form-layer nice-validator n-default n-bootstrap form" method="POST" action="/api/user/resetpwd.html" novalidate="novalidate">
<div style="height:70px;">
<input type="text" class="form-control" id="email" name="email" value="" placeholder="输入邮箱" aria-invalid="true">
</div>
<div class="codeBox" style="height:70px;">
<div class="form-group" style="height:70px; width:205px; float: left;">
<input type="text" name="captcha" class="form-control" placeholder="验证码" />
</div>
<span class="input-group-btn" style="padding:0;border:none;">
<a href="javascript:;" class="btn btn-primary btn-captcha cursorPointer" style="background: #2080F8; border-radius: 4px; color: #fff; padding: 12px;
position: absolute;" data-url="/api/ems/send.html" data-type="email" data-event="resetpwd">发送验证码</a>
</span>
</div>
<input type="password" class="form-control" id="newpassword" name="newpassword" value="" placeholder="请输入6-18位密码">
<div class="loginBtn mt25">
<button type="submit">重置密码</button>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="/assets/js/juejin-theme.js?v=20260613b" defer></script>
<script>
var _hmt = _hmt || [];
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var hm = document.createElement("script");
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<script src="/assets/js/frontend/common.js"></script>
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