A boundary aware tooltip built with pure HTML and CSS that intelligently positions itself to remain visible within screen or container limits, preventing text from being clipped or cut off near edges.
Usage
This component is ideal for interfaces where tooltips appear near screen edges or inside tight layouts, such as data tables, dashboards, charts, or icon toolbars where available space can vary dynamically.
Implementation
The boundary behavior is achieved using CSS positioning logic, transform offsets, and directional styling, allowing the tooltip to shift orientation (top, bottom, left, or right) based on available visual space.
HTML
<div class="tooltip-boundary">
<span class="tooltip-boundary__trigger">Info</span>
<span class="tooltip-boundary__content">Bounded tooltip</span>
</div>CSS
.tooltip-boundary {
width: 200px;
position: relative;
display: flex;
justify-content: center;
}
.tooltip-boundary__trigger {
font-size: 12px;
color: #00B7B5;
}
.tooltip-boundary__content {
position: absolute;
top: 120%;
padding: 0.4rem 0.55rem;
border-radius: 12px;
background: #111827;
color: #e5e7eb;
font-size: 11px;
opacity: 0;
transition: opacity 150ms ease;
}
.tooltip-boundary:hover .tooltip-boundary__content {
opacity: 1;
}Notes
- Built with pure HTML and CSS
- No JavaScript required
- Prevents tooltip overflow near edges
- Adapts placement based on surrounding space
- Improves readability in compact layouts
- Designed for constrained UI environments
Preview styles shown. Production customization recommended.
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