api.WebTransport - Add Safari support to compatibility table.

[hironichu]

What type of issue is this?

Missing compatibility data

What information was incorrect, unhelpful, or incomplete?

Safari has added early support for Webtransport behind flag in IOS 18

What browsers does this problem apply to, if applicable?

Safari

What did you expect to see?

Webtransport support behind flag

Did you test this? If so, how?

I have tested it but it's not yet very well implemented.

How : By enabling Webtransport in the developer menu for experimental features.

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

WebKit/WebKit#32920
WebKit/WebKit#37465
WebKit/WebKit#38216
WebKit/WebKit#37841
WebKit/WebKit#37465

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/WebTransport

MDN metadata

MDN page report details

• Query: api.WebTransport
• Report started: 2025-03-07T19:29:37.872Z

[caugner]

Verified that I can see this feature flag in Safari 18.3.1:

[caugner]

@hironichu Would you like to open a PR to update Safari support for features tagged with web-features:webtransport?

For supported features, you would want to replace: { "version_added": false } with the following:

{
  "version_added": "preview",
  "flags": [
    {
      "type": "preference",
      "name": "WebTransport",
      "value_to_set": "true"
    }
  ]
}

Important

To identify which features are supported, enable the feature flag in Safari TP, and run the following MDN BCD Collector tests:

• ⚠ https://mdn-bcd-collector.gooborg.com/tests/api/WebTransport
• ✅ https://mdn-bcd-collector.gooborg.com/tests/api/WebTransportDatagramDuplexStream
• ✅ https://mdn-bcd-collector.gooborg.com/tests/api/WebTransportError
• ✅ https://mdn-bcd-collector.gooborg.com/tests/api/WebTransportReceiveStream
• ⚠ https://mdn-bcd-collector.gooborg.com/tests/api/WebTransportSendStream

(⚠ = Some tests fail. / ✅ = All tests pass.)