Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Permissions-Policy header midi directive controls whether the current document is allowed to use the Web MIDI API.
Specifically, where a defined policy blocks use of this feature, Navigator.requestMIDIAccess() calls will return a Promise that rejects with a DOMException of type NotAllowedError.
Permissions-Policy: midi=<allowlist>;<allowlist>A list of origins for which permission is granted to use the feature. See Permissions-Policy > Syntax for more details.
The default allowlist for midi is self.