On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 79 on 2019-12-10
In Chrome Android version 79 on 2019-12-17
In Edge version 79 on 2020-01-15
In Firefox version 71 on 2019-12-10
In Firefox for Android version 79 on 2020-07-28
Not in Internet Explorer
In Quest Browser version 8.0 on undefined
In Opera version 66 on 2020-01-07
In Opera Android version 57 on 2020-03-30
In Safari version 15 on 2021-09-20 Note: Safari doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).
In Safari on iOS version 15 on 2021-09-20 Note: Safari on iOS doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).
In Samsung Internet version 12.0 on 2020-06-19
In WebView Android version 79 on 2019-12-17
In WebView on iOS version 15 on 2021-09-20 Note: WebView on iOS doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).