Best practice for incorporating type definition file into a fresh Angular webpack configuration

After migrating to the latest version of Angular 2.0 and utilizing angular-cli and webpack for our application build process, we encountered an issue with automatic compilation in Webstorm. While running commands like ng test or build worked fine, webstorm's automatic compilation resulted in numerous errors. Previously, we had a main.ts file that referenced other d.ts files, which was smoothly integrated using tsconfig.json.

describe("it is a suite",()=>{
it("it is a test",()=>{
expect(1).toBe(2);
})
});

Adding a reference to jasmine.d.ts in the test file resolved the static compilation error. On the other hand, importing from '@angular/core/testing' raised issues regarding missing exported members.

The question now arises - Where and how should we include the type definition file to prevent these static compilation errors?

In my Webstorm settings, I have opted for the bundled (1.8.10) version with the TypeScript compiler enabled, utilizing tsconfig.json for configuration.

The tsconfig.json file includes content from the angular-cli project here, with additional entries in the files section to encompass main.ts and typings.d.ts.

typings.d.ts contains no information, while main.ts references other d.ts files located under the 'typings' folder at the root level.

Answer №1

The problem lies within your TypeScript settings in WebStorm.

In order for Angular to function properly, it requires TypeScript version 2 or above. This is crucial for ensuring that type information can be reconciled through npm packages installed within the @types scope.

For example, by including this dev dependency @types/jasmine, you will have access to type information for functions like describe, it, and expect.

Answer №2

Setting up Webstorm for Angular 2 with TypeScript

If you are working with the latest version of angular-cli, specifically version 1.0.0-beta.17, you will need to make sure that your TypeScript version is updated from the bundled 1.8.10 to the newer 2.0.2 version that is installed by angular-cli through package.json.

To do this:

Go to the dialog box

settings/languages & frameworks/typescript/Configure TypeScript Compiler

Select a custom directory like: "YourProjectDir"/\node_modules\typescript\lib

In the dialog
settings/languages & frameworks/typescript

Enable the TypeScript Compiler and choose to use tsconfig.json

This should be all you need to update. You won't have to separately install any typings for jasmine anymore as angular-cli now handles it with @types/jasmine as mentioned in @Brocco's answer.

If you are not using Angular-cli:

npm install @types/jasmine --save-dev

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