Semantic CSS Tooltips

语义化提示信息（纯 CSS）

Hover over or tab to the highlighted words to see the tooltips. Modern web design should be resilient.

Home / 首页

SEO Insight / SEO 优化见解

Metadata Indexing via Attributes

Search engines like Google and Baidu crawl HTML attributes. By using data-tip to store secondary information, you provide robots with additional keyword context associated directly with your anchor text. This CSS-first approach leverages the attr() function, keeping the DOM light while ensuring contextual data is physically present in the source code.

谷歌和百度等搜索引擎会抓取 HTML 属性。通过使用 data-tip 存储辅助信息，您为机器人提供了与锚文本直接关联的额外关键词上下文。这种CSS 优先方案利用了 attr() 函数，在保持 DOM 轻量化的同时，确保上下文数据物理存在于源代码中。

Zero Rendering Blocking

Standard JS tooltip libraries often wait for the "DOMContentLoaded" event to calculate positions, which can delay page interactivity scores. This pattern uses pure CSS positioning relative to the parent element. This ensures the Cumulative Layout Shift (CLS) is zero, as the browser knows exactly where the tooltip "exists" before the first pixel is even drawn.

标准的 JS 提示库通常等待“DOMContentLoaded”事件来计算位置，这可能会延迟页面交互评分。此模式使用相对于父元素的纯 CSS 定位。这确保了累积布局偏移 (CLS) 为零，因为浏览器在绘制第一个像素之前就准确知道提示框“存在”于何处。