The WebSocket.bufferedAmount read-only property returns the number of bytes of data that have been queued using calls to send() but not yet transmitted to the network. This value resets to zero once all queued data has been sent. This value does not reset to zero when the connection is closed; if you keep calling send(), this will continue to climb.
var bufferedAmount = aWebSocket.bufferedAmount;
An unsigned long.
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'WebSocket: bufferedAmount' in that specification. | Living Standard | Initial definition |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | Yes | ? | Yes | ? | Yes | ? |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | ? | Yes | ? | Yes | ? | ? | ? |
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https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/bufferedAmount