MIDIMessageEvent data is incorrectly typed

[kyledecot]

🔎 Search Terms

In #57027 MIDIMessageEvent.data was changed from Uint8Array to Uint8Array | null (see https://github.com/microsoft/TypeScript/pull/57027/files#diff-dc0eab937d15e62545da3ed7b4f40ad6b24f15dd88fbc6ceda2bfb4ed8356eb0L14670).

According to https://developer.mozilla.org/en-US/docs/Web/API/MIDIMessageEvent/data data the value will always be an Uint8Array.

🕗 Version & Regression Information

This changed in #57027

⏯ Playground Link

No response

💻 Code

🙁 Actual behavior

'event.data' is possibly 'null'.ts(18047)

🙂 Expected behavior

No warning about data property possibly being null.

Additional information about the issue

No response

[mikezaby]

I have encountered this problem as well.