hidden="until-found"Limited availability
The hidden="until-found" attribute hides an element until it is found using the browser's find-in-page search or it is directly navigated to by following a URL fragment.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–101Not supported
102+Supportedsince May 24, 2022
Current: 155Edge
12–101Not supported
102+Supportedsince May 31, 2022
Current: 154Firefox
1–147Not supported
148+Supportedsince Feb 24, 2026
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–101Not supported
102+Supportedsince May 24, 2022
Current: 155Firefox Android
4–147Not supported
148+Supportedsince Feb 24, 2026
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Safari, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: beforematch event.
Feature detection
JS · check before using
if ("hidden" in HTMLElement.prototype) {
// the hidden attribute is supported
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (2). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| Element.beforematch_event | 102 | 102 | 139 | 26.2 | 102 | 139 | 26.2 |
| hidden.until-found | 102 | 102 | 148 | ✕ | 102 | 148 | ✕ |