如果不在/ node_modules / @ types / *文件夹中，则不考虑DefinedTypes文件

Question

It seems that my typescript compiler is not detecting the DefinedTypes file of the modules when they are in the module (./node_modules//index.d.ts) but detects them in @types folder (./node_modules/@types//index.d.ts).

For example with express-validator, the module comes with its defined type (see: https://github.com/milkeg/testDefinedType/blob/master/node_modules/express-validator/index.d.ts ) but when I try to compile using tsc command, I have the following error:

app.ts:5:28 - error TS2307: Cannot find module 'express-validator'.

5 import * as validator from 'express-validator';

My tsconfig.json file is:

{
    "compilerOptions": {
      "outDir": "./build",
      "allowJs": true,
      "target": "es2018",
      "alwaysStrict": true,
    },
    "include": [
      "./**/*",
    ],
    "exclude": [
      "./node_modules/**/*",
      "./build/**/*"
    ],
}

I tried to add "./node_modules/**/*.d.ts" to the include option, but it does not help.

Repo of the example: https://github.com/milkeg/testDefinedType

What should I change to make sure that tsc is taking into account the .d.ts file that are within the module itself (and not only under ./node_modules/@types/*)?

Answer 1

Just add

"typeRoots": [
  "./node_modules/@types",
  "./path/to/custom/dtsfolder/"
],

to your tsconfig.json .