Matching TypeScript values and types does not function as intended

Recently, I delved into TypeScript to work on my new AngularJS project. However, I encountered an issue where the id, which is supposed to be of type number, is actually being treated as a string. Have I overlooked something in my code?

interface IRouteParams extends ng.route.IRouteParamsService {
    id: number;
}

class FooController {
    constructor(private $routerParams: IRouteParams, private fooService: IFooService) {
        fooService.getById($routerParams.id);
    }
}

export interface IFooService {  
    getById(id: number): ng.IPromise<number>;
}

class FooService implements IFooService {

    getById(id: number): angular.IPromise<number> {
        const defer = this.$q.defer<IRace>();

        if (id === -1) {
           // not working           
        }

        return defer.promise;
    }
}

Answer №1

Route parameters are inherently represented as strings, as they originate from the URL. Even if specified as id: number in TypeScript, the data type remains unchanged. It is imperative to declare route parameters as id: string.

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