WebMIDI

[sy-filis]

Hi there,

Could someone please address an issue with the WebMIDI API types lib.dom.d.ts:14856-15024?

I believe that MIDIInputMap should extend ReadOnlyMap<MIDIInput["id"], MIDIInput> (MDN) and that the forEach method could be removed as part of ReadOnlyMap interface (es2015.iterable.d.ts:119, es2015.collection.d.ts:37). The same situation applies to MIDIOutputMap (MDN).

The second issue concerns constructors for MIDIAccess, MIDIInputMap, MIDIOutputMap, MIDIPort, MIDIInput and MIDIOutput. When attempting to instantiate any of these, I encounter an Uncaught TypeError: Illegal constructor error, although TypeScript indicates it should be permissible.

Thank you.

[saschanaz]

The reason it's done with forEach is because es5 doesn't support Map. For target: ES2015+ you should automatically get ReadonlyMap:

TypeScript-DOM-lib-generator/baselines/dom.iterable.generated.d.ts

Lines 171 to 172 in 4d34d6d

	interface MIDIInputMap extends ReadonlyMap<string, MIDIInput> {
	}

Or you can give "lib": ["dom", "dom.iterable"].