overlayLimited availability
The overlay CSS property, used as an allow-discrete CSS transition, prevents a top layer element, such as a popover or a <dialog>, from being removed from the top layer before it has finished animating. You can't set the value of the overlay property; only use it as transition property.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–116Not supported
117+Supportedsince Sep 12, 2023
Current: 155Edge
12–116Not supported
117+Supportedsince Sep 15, 2023
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–116Not supported
117+Supportedsince Sep 12, 2023
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: overlay.
Feature detection
CSS · check before using
@supports (overlay: initial) {
/* styles that rely on overlay */
}
/* or in JavaScript */
if (CSS.supports("overlay", "initial")) {
// use it
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (3). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| overlay | 117 | 117 | ✕ | ✕ | 117 | ✕ | ✕ |
| overlay.auto | 117 | 117 | ✕ | ✕ | 117 | ✕ | ✕ |
| overlay.none | 117 | 117 | ✕ | ✕ | 117 | ✕ | ✕ |