ruby-overhang
The ruby-overhang CSS property sets whether ruby annotations may overlap adjacent text. It is useful when you need more deliberate control over presentation or behavior in a focused part of the interface.
Overview
The ruby-overhang CSS property sets whether ruby annotations may overlap adjacent text. It is useful when you need more deliberate control over presentation or behavior in a focused part of the interface.
Browser support
| Feature | Desktop | Mobile | ||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Safari | Chrome Android | Safari iOS | |
| | | | 18.2 | | 18.2 | |
auto | | | | 18.2 | | 18.2 |
none | | | | 18.2 | | 18.2 |
1+Supported (version) Not supported ※Has note Sub-feature descriptions sourced from MDN Web Docs (CC BY-SA 2.5)
Syntax
CSS
ruby {
ruby-overhang: auto;
}
.strict-ruby {
ruby-overhang: none;
}Live demo
Use cases
Refine text rhythm
Use ruby-overhang to make long-form reading or dense interface copy easier to scan and understand.
Support language nuances
Apply ruby-overhang when different writing systems or typographic conventions need more deliberate control.
Cautions
- Test ruby-overhang in the browsers you support, especially if it changes layout, text handling, or interaction behavior.
- Plan a fallback or acceptable degradation path when support is still limited.
Accessibility
- Check readability with zoom, narrow screens, and mixed-language content so text remains understandable.
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