W3School TIY Editor
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<!DOCTYPE html> <html> <style> .tooltip { position: relative; display: inline-block; border-bottom: 1px dotted black; } .tooltip .tooltiptext { visibility: hidden; width: 120px; background-color: #555; color: #fff; text-align: center; border-radius: 6px; padding: 5px 0; position: absolute; z-index: 1; bottom: 125%; left: 50%; margin-left: -60px; opacity: 0; transition: opacity 0.3s; } .tooltip .tooltiptext::after { content: ""; position: absolute; top: 100%; left: 50%; margin-left: -5px; border-width: 5px; border-style: solid; border-color: #555 transparent transparent transparent; } .tooltip:hover .tooltiptext { visibility: visible; opacity: 1; } </style> <body style="text-align:center;"> <h2>工具提示</h2> <p>将鼠标移动到以下文本上：</p> <div class="tooltip">将鼠标悬停在我身上 <span class="tooltiptext">工具提示文本</span> </div> </body> </html>