Could not find a declaration file for module 'midi-file' about midi

[tambien]

i think the trick here has to do with tsconfig. I wrote up a .d.ts for midi-file, but it doesn't seem to always be included in the builds. Didn't work path relative, so maybe it's got to be linked in another way.

[motifn]

FWIW the only way I could get this to work was to copy the latest midi-file.d.ts into the app that references Tonejs/midi. A reasonable stop-gap solution until we figure out how to link it properly (or until official type definitions for midi-file are published).

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stephaneeybert]

I get the same error message:

ERROR in node_modules/@tonejs/midi/dist/Header.d.ts:1:26 - error TS7016: Could not find a declaration file for module 'midi-file'. '/home/stephane/dev/js/projects/angular/musicng/node_modules/midi-file/index.js' implicitly has an 'any' type.
  Try `npm install @types/midi-file` if it exists or add a new declaration (.d.ts) file containing `declare module 'midi-file';`                                                                                                                          

1 import { MidiData } from "midi-file";

I'm on an Angular 9 app having installed the dependency like:

npm install midi-file

My package.json file contains the dependencies:

"midi": "^1.0.0",
"midi-file": "^1.1.2",
"midi-file-slicer": "^5.0.45",
"midi-json-parser": "^6.4.19",
"web-midi-api": "^2.0.7",
"@tonejs/midi": "^2.0.20",
"@tonejs/ui": "0.0.9",

I cannot see any type definition file in my dependency:

$ tree node_modules/midi-file
node_modules/midi-file
├── index.js
├── lib
│   ├── midi-parser.js
│   └── midi-writer.js
├── package.json
└── README.md
1 directory, 5 files

[stephaneeybert]

After I copied the content of the https://raw.githubusercontent.com/Tonejs/Midi/master/src/midi-file.d.ts file into a file in my app typings directory, as in:

$ tree typings/
typings/
├── midi-file
│   └── index.d.ts
├── nexusui
│   └── index.d.ts
└── tone
    └── index.d.ts

the issue was gone.