The ready read-only property of the WebTransport interface returns a promise that resolves when the transport is ready to use.
Note: This feature is available in Web Workers
The ready read-only property of the WebTransport interface returns a promise that resolves when the transport is ready to use.
Note: This feature is available in Web Workers
A Promise that resolves to undefined.
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;
  // ...
}
// ...
async function closeTransport(transport) {
  // Respond to connection closing
  try {
    await transport.closed;
    console.log(`The HTTP/3 connection to ${url} closed gracefully.`);
  } catch (error) {
    console.error(`The HTTP/3 connection to ${url} closed due to ${error}.`);
  }
}
| Specification | 
|---|
| WebTransport # dom-webtransport-ready | 
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
| ready | 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/WebTransport/ready