<ruby>Baseline · Widely available
The <ruby> element produces small annotations that are rendered with its base text.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.
Browser support
DesktopChrome
1–4Not supported
5+Supportedsince May 25, 2010
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1–37Not supported
38+Supportedsince May 12, 2015
Current: 157Safari
1–4Not supported
5+Supportedsince Jun 7, 2010
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4–37Not supported
38+Supportedsince May 12, 2015
Current: 157Safari iOS
1–4Not supported
4.2+Supportedsince Nov 22, 2010
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: rp.
Feature detection
JS · check before using
const el = document.createElement("ruby");
if (!(el instanceof HTMLUnknownElement)) {
// <ruby> is supported
}Specification
Usage share
Sub-features
Support for each part of the feature (3). The overall table above shows when the whole feature works.