WebTransport: reliability property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
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 reliability read-only property of the WebTransport interface indicates whether the connection supports reliable transports only, or whether it also supports unreliable transports (such as UDP).
Value
A string with one of the following values:
pending-
The connection has not yet been established. The reliability is not yet known.
reliable-only-
The connection only supports reliable transports.
supports-unreliable-
The connection supports both unreliable and reliable transports.
Examples
const url = "https://example.com:4999/wt";
async function initTransport(url) {
// Initialize transport connection
const transport = new WebTransport(url);
// Once ready fulfils the connection can be used
// Prior to this the reliability is "pending"
await transport.ready;
if (transport.reliability === "reliable-only") {
// Use connection only with reliable transports
} else {
// Use connection with either reliable or unreliable transports.
}
// …
}
Specifications
| Specification |
|---|
| WebTransport # dom-webtransport-reliability |
Browser compatibility
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reliability
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Legend
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- Full support
- Full support
- No support
- No support
- User must explicitly enable this feature.