Ts-node: Cannot find name xxx, while defined in @types/xxx.d.ts

[adaamz]

Expected Behavior

No import error

Actual Behavior

vehicle.ts:1:41 - error TS2304: Cannot find name 'Vehicle'.

while webpack compiles with no problems (via ts-loader)

Steps to reproduce the problem

1. create @types/vehicle.d.ts with defined type Vehicle
2. create vehicle.ts with used type Vehicle from vehicle.d.ts
3. run ts-node vehicle.ts

Minimal reproduction repository (with github actions integrated)

https://github.com/adaamz/ts-node-jasmine-bug

Specifications

• ts-node version: 8.10.2
• node version: 10, 12, 14
• TypeScript version: 3.9.5
• tsconfig.json:

{
  "compilerOptions": {
    "allowJs": false,
    "allowSyntheticDefaultImports": false,
    "alwaysStrict": true,
    "esModuleInterop": false,
    "module": "commonjs",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "removeComments": true,
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictFunctionTypes": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
    "target": "es5"
  }
}

• Operating system and version:
  Windows 10, also github actions (ubuntu latest)

[cspotcode]

Try running ts-node with the --files flag. Tsc loads all matched "files"
and "includes" when it typechecks; ts-node does not for performance
reasons. --files makes it load them like tsc.

On Thu, Jun 11, 2020, 7:43 AM Adam Žurek [e-mail] wrote:

Expected Behavior

No import error
Actual Behavior

vehicle.ts:1:41 - error TS2304: Cannot find name 'Vehicle'.

Steps to reproduce the problem

1. create @types/vehicle.d.ts with defined type Vehicle
2. create vehicle.ts with used type Vehicle from vehicle.d.ts
3. run ts-node vehicle.ts

Minimal reproduction repository (with github actions integrated)

https://github.com/adaamz/ts-node-jasmine-bug
Specifications

• ts-node version: 8.10.2
• node version: 10, 12, 14
• TypeScript version: 3.9.5
• tsconfig.json:

{
"compilerOptions": {
"allowJs": false,
"allowSyntheticDefaultImports": false,
"alwaysStrict": true,
"esModuleInterop": false,
"module": "commonjs",
"noFallthroughCasesInSwitch": true,
"noImplicitAny": true,
"noImplicitReturns": true,
"noImplicitThis": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"removeComments": true,
"skipLibCheck": true,
"sourceMap": true,
"strict": true,
"strictFunctionTypes": true,
"strictNullChecks": true,
"strictPropertyInitialization": true,
"target": "es5"
}
}

• Operating system and version:
  Windows 10, also github actions (ubuntu latest)

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[cspotcode]

I should say "eagerly loads.". Ts-node always loads files when they're ///
on tsc's eager loading of all matched "includes" and "files"

On Thu, Jun 11, 2020, 12:43 PM Andrew Bradley [e-mail] wrote:

Try running ts-node with the --files flag. Tsc loads all matched
"files" and "includes" when it typechecks; ts-node does not for performance
reasons. --files makes it load them like tsc.

On Thu, Jun 11, 2020, 7:43 AM Adam Žurek [e-mail] wrote:

Expected Behavior

No import error
Actual Behavior

vehicle.ts:1:41 - error TS2304: Cannot find name 'Vehicle'.

Steps to reproduce the problem

1. create @types/vehicle.d.ts with defined type Vehicle
2. create vehicle.ts with used type Vehicle from vehicle.d.ts
3. run ts-node vehicle.ts

Minimal reproduction repository (with github actions integrated)

https://github.com/adaamz/ts-node-jasmine-bug
Specifications

• ts-node version: 8.10.2
• node version: 10, 12, 14
• TypeScript version: 3.9.5
• tsconfig.json:

{
"compilerOptions": {
"allowJs": false,
"allowSyntheticDefaultImports": false,
"alwaysStrict": true,
"esModuleInterop": false,
"module": "commonjs",
"noFallthroughCasesInSwitch": true,
"noImplicitAny": true,
"noImplicitReturns": true,
"noImplicitThis": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"removeComments": true,
"skipLibCheck": true,
"sourceMap": true,
"strict": true,
"strictFunctionTypes": true,
"strictNullChecks": true,
"strictPropertyInitialization": true,
"target": "es5"
}
}

• Operating system and version:
  Windows 10, also github actions (ubuntu latest)

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Reply to this email directly, view it on GitHub
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.

[adaamz]

thx for reply!
So how should I change my code that i don't need this "hack"/change of default behavior?
I don't understand what is non-standard in my codebase.

[cspotcode]

Add a ///

On Thu, Jun 11, 2020, 2:04 PM Adam Žurek [e-mail] wrote:

thx for reply!
So how should I change my code that i don't need this "hack"/change of
default behavior?
I don't understand what is non-standard in my codebase.

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[adaamz]

So the @types directory is problem?

I have there currently only 1 file in my project, so I can move it somewhere else. My use case for this is I want to hide/separate definitions from real app code, because it is really long :-/

[cspotcode]

To make TSC behave like ts-node, make the files and include arrays in your tsconfig empty except for the entry-point file.

"files": ["vehicle.ts"],
"include": [],

That's what ts-node is doing. Empty arrays, except when a file is require()d, it gets added to the files array.

Then you can experiment to make your setup work the way you want.

Since this is not a ts-node bug, this is all the assistance I have time to provide. ts-node's README, StackOverflow, reddit, and the TypeScript Discord may be able to offer more assistance.

Good luck!

[adaamz]

Thanks for tips.

I get to working solution with these changes

• tsconfig.json moved to project root
• added typeRoots to tsconfig.json
• moved vehicle types to @types/Vehicle/index.d.ts
  https://github.com/adaamz/ts-node-jasmine-bug/pull/1

Do you have any idea why this works and why is necessery to have tsconfig in project root and manually set these typeRoot directories and have types in this vehicle/index.d.ts (even have types in vehicle.d.ts and import in index.d.ts doesnt work)?

Anyway I will use that --files, much thanks for that, works out-of-box without changing codebase.