The maxDatagramSize read-only property of the WebTransportDatagramDuplexStream interface returns the maximum allowable size of outgoing datagrams, in bytes, that can be written to writable.
Note: This feature is available in Web Workers
The maxDatagramSize read-only property of the WebTransportDatagramDuplexStream interface returns the maximum allowable size of outgoing datagrams, in bytes, that can be written to writable.
Note: This feature is available in Web Workers
A number.
js
const url = "https://example.com:4999/wt";
async function initTransport(url) {
  // Initialize transport connection
  const transport = new WebTransport(url);
  // The connection can be used once ready fulfills
  await transport.ready;
  const datagrams = transport.datagrams;
  // get maxDatagramSize
  console.log(datagrams.maxDatagramSize);
}
   | Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
maxDatagramSize | 
       97 | 97 | 114 | No | 83 | No | 97 | 97 | 114 | 68 | No | 18.0 | 
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 https://developer.mozilla.org/en-US/docs/Web/API/WebTransportDatagramDuplexStream/maxDatagramSize