The CSS Tooltip effect is implemented through pure CSS without JavaScript; 2. Use :hover to trigger visibility and opacity changes to achieve display and fade in animation; 3. The prompt box is positioned through position:absolute, and left:50% plus transform:translateX (-50%) to achieve horizontal centering; 4. Use ::after pseudo-element to create a small arrow pointing down; 5. z-index:1 to ensure that the prompt box is at the top level; 6. You can adjust attributes such as top, bottom and border-color to achieve prompt boxes in different directions up, down, left and right directions; 7. It is recommended to use visibility instead of display to support transition animation; 8. This component can be reused on any hoverable element, and the style can be customized with colors, rounded corners, shadows, etc. It is a practical and easy-to-integrate front-end interaction solution.
A common CSS Tooltip effect can be implemented through pure CSS without JavaScript. Here is a simple and practical example where a prompt text is displayed when the user hoveres over an element.

? Basic CSS Tooltip Example
HTML
<div class="tooltip"> Hover me<span class="tooltip-text">This is a prompt</span> </div>
CSS
/* outer container style*/ .tooltip { position: relative; display: inline-block; border-bottom: 1px dotted black; /* Optional: Underlined to hover*/ cursor: pointer; padding: 10px; } /* The prompt box is hidden by default*/ .tooltip .tooltip-text { visibility: hidden; width: 200px; background-color: #333; color: #ffff; text-align: center; border-radius: 6px; padding: 8px; position: absolute; z-index: 1; /* Positioning above the element centered*/ bottom: 125%; /* Show above the element*/ left: 50%; transform: translateX(-50%); /* Add small arrow (optional) */ opacity: 0; transition: opacity 0.3s, visibility 0.3s; } /* Small arrow*/ .tooltip .tooltip-text::after { content: ""; position: absolute; top: 100%; /* Arrow is below the prompt box*/ left: 50%; margin-left: -5px; border-width: 5px; border-style: solid; border-color: #333 transparent transparent transparent; } /* Show prompt box when hovering*/ .tooltip:hover .tooltip-text { visibility: visible; opacity: 1; }
? Effect description
- Pure CSS implementation : Use
:hover
andvisibility
to control display/hide. - Smooth animation : Fade in and out effect through
transition
. - Arrow design : Use pseudo-element
::after
to create small triangles pointing to the hovered element. - Center Alignment :
left: 50% transform
achieve horizontal centering.
? Tooltip in other locations (optional)
You can change the prompt box position by adjusting the positioning properties:
The following displays :
top: 125%; bottom: auto;
Change the arrow direction to upward:
border-color: transparent transparent #333 transparent;
-
Left or right : Adjust
left
/right
andtop
and modify the arrow direction. - Use
visibility: hidden/visible
instead ofdisplay: none/block
to support transition animation. -
z-index: 1
Make sure the prompt box is displayed on the top level. - You can customize colors, rounded corners, shadows, etc. according to the theme.
? Tips
Basically all this is not complicated but very practical. You can encapsulate this component into .tooltip
class and reuse it on various elements such as buttons, icons, and links.
The above is the detailed content of css tooltip example. For more information, please follow other related articles on the PHP Chinese website!

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