On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Bun version 1.0.23 on 2024-01-16
In Chrome version 125 on 2024-05-14
In Chrome Android version 125 on 2024-05-14
In Deno version 1.37 on 2023-09-20
In Edge version 125 on 2024-05-17
In Firefox version 141 on 2025-07-22
In Firefox for Android version 141 on 2025-07-22
Not in Internet Explorer
In Node.js version 24.0.0 on 2025-05-06 Note: Only available for fs and stream resources. Only available for fs and stream resources.
Not in Quest Browser
In Opera version 111 on 2024-06-12
In Opera Android version 83 on 2024-06-25
Not in Safari
Not in Safari on iOS
In Samsung Internet version 27.0 on 2024-11-06
In WebView Android version 125 on 2024-05-14
Not in WebView on iOS