When import <pkg> in typescript, typescript will analysis package.json of the imported package, and look for types field. types field specify the type definition file of the package. So, when you create your own package with types, don't forget to specify types field in package.json.
As for exports.types field in package.json, it's not used by Typescript yet. So, if you specify exports.types instead of types, Typescript will report cannot find module xxx error.
"main": "./lib/cjs/index.js",
"module": "./lib/esm/index.js",
"types": "./lib/cjs/types/index.d.ts", // -> type definition file specified for Typescript
"exports": {
".": {
"import": "./lib/esm/index.js",
"require": "./lib/cjs/index.js",
"types": "./lib/cjs/types/index.d.ts", // -> not used by Typescript yet
"node": "./lib/cjs/index.js"
}
},
