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I am facing a problem that I cannot resolve. I want to share some interfaces and types between my class files.

My repo is something like this :

-> dist/ -> src/ -> index.ts -> .babelrc -> .eslintrc.js -> index.d.ts -> package.json -> tsconfig.json

In index.d.ts :

declare module test { // I've try with 'declare namespace test' but the result is the same
  export interface LabeledValue {
    label: string;
    size: number;
If I import LabeledValue in index.ts I get an error and I don't understand the reason:
import { LabeledValue} from 'test'; //  TS2307: Cannot find module 'test'.
src/index.ts
import {LabeledValue} from 'test';
function printLabel(labeledObj: LabeledValue) {
  console.log(labeledObj.label);
let myObj = {size: 10, label: "Size 10 Object"};
printLabel(myObj);
package.json:
  "name": "test",
  "types": "index.d.ts",
  "version": "1.0.0",
  "description": "test",
  "author": "oyabi",
  "license": "MIT",
  "private": true,
  "scripts": {
    "type-check": "tsc --noEmit",
    "type-check:watch": "yarn type-check --watch",
    "build": "npm run build:types && npm run build:js",
    "build:types": "tsc --emitDeclarationOnly",
    "build:js": "babel src --out-dir dist --extensions \".ts,.tsx\" --source-maps inline"
  "dependencies": {
    "axios": "^0.19.0",
    "body-parser": "^1.18.3",
    "express": "^4.16.4",
    "helmet": "^3.21.2",
    "morgan": "^1.9.1",
    "winston": "^3.1.0"
  "devDependencies": {
    "@babel/cli": "^7.7.0",
    "@babel/core": "^7.7.2",
    "@babel/plugin-syntax-class-properties": "^7.0.0",
    "@babel/polyfill": "^7.7.0",
    "@babel/preset-env": "^7.7.1",
    "@babel/preset-typescript": "^7.7.2",
    "@babel/runtime": "^7.7.2",
    "@types/express": "^4.17.2",
    "@types/helmet": "^0.0.45",
    "@types/morgan": "^1.7.36",
    "@types/qrcode": "^1.3.4",
    "@typescript-eslint/eslint-plugin": "^2.7.0",
    "@typescript-eslint/parser": "^2.7.0",
    "apidoc": "^0.18.0",
    "babel-core": "^7.0.0-bridge",
    "babel-eslint": "^10.0.1",
    "babel-jest": "^24.8.0",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "babel-preset-airbnb": "^4.2.0",
    "babel-preset-env": "^1.7.0",
    "eslint": "^6.6.0",
    "eslint-config-airbnb-base": "^14.0.0",
    "eslint-config-prettier": "^6.5.0",
    "eslint-friendly-formatter": "^4.0.1",
    "eslint-plugin-import": "^2.18.2",
    "eslint-plugin-jest": "^23.0.4",
    "eslint-plugin-prettier": "^3.1.0",
    "jest": "^24.8.0",
    "moxios": "^0.4.0",
    "nodemon": "^1.19.4",
    "prettier": "^1.19.1",
    "retire": "^2.0.1",
    "supertest": "^4.0.2",
    "typescript": "^3.7.2",
    "uuid": "^3.3.2"
.babelrc
  "presets": ["@babel/typescript",
    ["airbnb", {
      "useBuiltIns": "usage"
  "plugins": [
    "syntax-class-properties",
    "transform-class-properties"
.eslintrc
module.exports = {
  root: true,
  parser: "@typescript-eslint/parser",
  parserOptions: {
    sourceType: "module",
    project: "./tsconfig.json"
  env: {
    node: true,
    jest: true
  extends: [
    "airbnb-base",
    "plugin:@typescript-eslint/recommended",
    "plugin:jest/recommended",
    "plugin:prettier/recommended",
    "prettier/@typescript-eslint",
    "plugin:import/errors",
    "plugin:import/warnings",
    "plugin:import/typescript"
  plugins: ["@typescript-eslint", "jest", "import"],
  rules: {
    "import/no-commonjs": "error",
    "import/no-amd": "error",
    // allow debugger during development
    "no-debugger": process.env.NODE_ENV === "production" ? 2 : 0,
    "no-underscore-dangle": 0,
    "prettier/prettier": [
        printWidth: 80,
        singleQuote: true,
        trailingComma: "all"
  settings: {
    "import/resolver": {
      node: {
        extensions: [".js", ".jsx", ".ts", ".tsx"]
tsconfig.json
  "compilerOptions": {
    "target": "esnext",
    "module": "commonjs",
    "declaration": true,
    "outDir": "./dist",
    "strict": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "noImplicitThis": true,
    "esModuleInterop": true,
    "resolveJsonModule": true
  "include": ["index.d.ts"]
My real code is more complicated but you have a good idea of the problem.
The error appears in Visual Studio Code and with yarn build (with real code). With this code you can use yarn tsc src/index.ts to show error.
Do you have any idea how I can solve this problem please?
Therefore you need to have an ES module (not namespace/module keywords which are TypeScript modules). 
Your index.d.ts should look like: 
  export interface LabeledValue {
    label: string;
    size: number;
A root level export makes the file an ES module and now your ES import will work.
                Even with this trick, the error is always present. What's the difference with ES module and typescript module ?
– Oyabi
                Nov 15, 2019 at 18:58
I had Visual Studio Code reporting ts(2307) on my own module from a test file.  The problem was my test files were compiled using a file named tsconfig.misc.json; that worked for my VSCode typechecking and linting EXCEPT for this one issue.  When I renamed it to tsconfig.json in the test subdirectory of the project, it worked.
        
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