How to import modules with ‘Typings’ in TypeScript without ?

Question

I`m trying to write tests with Protractor and Jasmine in TypeScript. TSD is now deprecated so I have to use 'Typings' to manipulate TypeScript definitions. So I installed it:

npm install typings -g

Then I used it to install Jasmine and Chance definitions like that:

typings install jasmine --source dt --save –-global
typings install chance--source dt --save –-global

And I also added “files” section and excluded 'node_modules':

// tsconfig.json
{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "declaration": false,
    "noImplicitAny": false,
    "outDir": "tmp",
    "types": ["node", "jasmine", "chance"]
  },
  "files": [
    "typings/index.d.ts"
  ],
  "include": [
    "lib",
    "specs"
  ],
  "exclude": [
    "node_modules"
  ]
}

The problem is neither WebStorm nor Visual Code studio can`t find definitions for all Jasmine methods and 'chance' module. Errors are:

**“TS2304: Cannot find name 'describe'”** 
**“TS2307: Cannot find module 'chance'”**

respectively. Here is my spec file:

In 'typings/' folder I see reference links to TypeScript definitions:

Am I missing something? Why my IDE can`t find definitions for Jasmine and Chance?

P.S. Test works after transpiling to Javacript.

P.S.S. Errors will disappear after adding

///<reference path="###"/>

to the spec file. But I don`t want to use it.

Protractor: 4.0.9;
TypeScript 2.0.3;
Typings 1.5.0;

Thanks in advance!

Answer 1

There's a few things that are preventing things from working well for you. First of all, if you are using Typescript 2.0 then typings is also sort of deprecated.

Typescript 2.0 supports packaging typings in node modules (usually installed by npm install @types/module-name. All declarations available on definitely typed are also available as npm modules under the "@types/*" namespace, so if you are looking to move away from tsd, typings should not be your final destination.

That being said, typescript 2.0 will still work with typings so let me point a few of the issues I see in your config file.

Types Property

{ 
    "types": ["node", "jasmine", "chance"]  
}

The types, property is meant to only be used with the new npm package-based typings in @types/*. Since you are not using this yet, you should not have this property in your tsconfig.json. (See TypeScript 2: custom typings for untyped npm module for a full discussion of what this and related properties do.

Files/Include/exclude properties

{
 "files": [
    "typings/index.d.ts"
  ],
  "include": [
    "lib",
    "specs"
  ],
  "exclude": [
    "node_modules"
  ]
}

While you can chose to use both files and include properties at the same time, this is not necessary. You can move your typings/index.d.ts reference from the files array and into the include array and then just eliminate files.

Also, the big problem you have is that your include syntax is wrong. include takes glob patterns. You cannot just simply put folder names, but need to follow them by a recursive pattern:

{
  "include": [
    "typings/index.d.ts",
    "lib/**/*",
    "specs/**/*"
  ],
}

The last thing is that you do not need to exclude node_modules. Exclude is only necessary to exclude things that would otherwise match your include patterns. Since node_modules would not be matched by your include patterns, there is no need to exclude it.

I think if you make these small changes things should work as you expect, but again, I would really look into going all the way and migrating to the new @types/* based typings, as they are much easier to manage and more convenient and do not require an external tool (other than npm) like typings or tsd.

Answer 2

You need to update your compilerOptions as follows:

  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "declaration": false,
    "noImplicitAny": false,
    "outDir": "tmp",
    "typeRoots": ["./typings"] // Updated!
  },

typeRoots automatically includes all definition files under the specified folder(s) in your compilation without the need to add a references directive to the relevant files, or the need to create an index file (which you then need to update whenever you add a new ambient library).

Your current configuration ("types": ["node", "jasmine", "chance"]) will only search for definition files in node_modules/@types, and then only include the node, jasmine, and chance definitions.

This is explained in detail in the tsconfig.json documentation.

EDIT: You're using a JetBrains IDE. If the IDE is compiling the JS for you, make sure it's using your tsconfig.json for settings instead of its own. It's in the preferences.