On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 120 on 2023-12-05 Note: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In Chrome Android version 120 on 2023-12-05 Note: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In Edge version 120 on 2023-12-07 Note: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In Firefox version 41 on 2015-09-22
In Firefox for Android version 41 on 2015-09-22
Not in Internet Explorer
In Quest Browser version 5.0 on undefined Note: Prior to version false, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In Opera version 106 on 2023-12-19 Note: Prior to version 106, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In Opera Android version 80 on 2024-01-25 Note: Prior to version 80, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In Safari version 10 on 2016-09-20
In Safari on iOS version 10 on 2016-09-13
In Samsung Internet version 25.0 on 2024-04-24 Note: Prior to version 25.0, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In WebView Android version 120 on 2023-12-05 Note: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
In WebView on iOS version 10 on 2016-09-13