Fails to resolve types in non (../)*node_modules/@types pattern directories

[stephenzsy]

TypeScript Version: 2.7.0-dev.20171209

Code

With specific typeRoots and baseUrl

tsconfig.json

{
        "target": "ES6",
        "module": "commonjs",
        "lib": ["es5", "es6", "es2015.promise", "dom", "scripthost"],
        "jsx": "react",
        "declaration": true,
        "sourceMap": true,
        "rootDir": "../",
        "stripInternal": true,
        "noEmitOnError": true,
        "skipLibCheck": true,
        "suppressExcessPropertyErrors": true,
        "strict": true,
        "moduleResolution": "node",
        "typeRoots": ["<someDir>/node_modules/@types"],
        "inlineSources": true,
        "experimentalDecorators": true,
        "baseUrl": "<someDir>/node_modules"
}

// A *self-contained* demonstration of the problem follows...
// Test this by running `tsc` on the command-line, rather than through another build tool such as Gulp, Webpack, etc.

import * as nonTypedModule from '<non-typed-npm-module>'

There exists type declaration files in

<someDir>/node_modules/@types/<non-typed-npm-module>/index.d.ts

Expected behavior:

Compile without error

Actual behavior:

error TS7016: Could not find a declaration file for module '<non-typed-npm-module>'

[ghost]

typeRoots affects global definitions. An import statement will go through module resolution to try and find a target.
If you really want to import things from a nested node_modules directory that wouldn't normally be accessible, you could use path mapping (see the "module resolution" link).

[stephenzsy]

Thanks I added the @types into the paths and it resolves my issue.