text-size-adjustLimited availability
The text-size-adjust CSS property disables or modifies the browser's default text size adjustment for small screen sizes.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–53Not supported
54+Supportedsince Oct 12, 2016
Current: 155Edge
12–18Not supported
79+Supportedsince Jan 15, 2020
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–53Not supported
54+Supportedsince Oct 19, 2016
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: text-size-adjust.
Feature detection
CSS · check before using
@supports (text-size-adjust: initial) {
/* styles that rely on text-size-adjust */
}
/* or in JavaScript */
if (CSS.supports("text-size-adjust", "initial")) {
// use it
}Documentation (MDN)
Specification
Usage share
Sub-features
Support for each part of the feature (4). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| text-size-adjust | 54 | 79 | ✕ | ✕ | 54 | ✕ | ✕ |
| text-size-adjust.auto | 54 | 79 | ✕ | ✕ | 54 | ✕ | ✕ |
| text-size-adjust.none | 54 | 79 | ✕ | ✕ | 54 | ✕ | ✕ |
| text-size-adjust.percentages | 54 | 79 | ✕ | ✕ | 54 | ✕ | ✕ |