WebTransportDatagramDuplexStream: incomingMaxAge property

Baseline 2026

Newly available

Since March 2026, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

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Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is available in Web Workers.

The incomingMaxAge property of the WebTransportDatagramDuplexStream interface gets or sets the maximum age for incoming datagrams, in milliseconds.

Value

A number, or null if no maximum age has been set.

Examples

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;

  // set incomingMaxAge
  datagrams.incomingMaxAge = 2000;

  // get incomingMaxAge
  console.log(datagrams.incomingMaxAge);
}