Type annotations for class methods are not being exported

Question

Type annotations for class methods are not being exported

Within the cso-api.ts file, I have a class definition for CsoAPI:

export default class CsoAPI extends RESTDataSource {
  constructor() {
    ...
  }

  async getNamePopularityDataByYear(year:number): Promise<NamePopularityData> {
    ...

Even though this function is specified to return a type of

Promise<NamePopularityData>

, why am I not receiving any warnings or errors when I import it into another file and assign it to a string?

import  CsoAPI from '../apis/cso-api';
...
const nameData:string = await CsoAPI.getNamePopularityDataByYear(year)

Furthermore, when hovering over the imported function in VSCode, the incorrect type is displayed: https://i.sstatic.net/TJs23.png

typescript visual-studio-code types

Answer 1

Answer №1

The function <code>retrieveDataForYear

is a static method based on the class definition of DataFetcher. To invoke it, we must call it directly using the class name, like...

const data: string = await DataFetcher.retrieveDataForYear(year);

If we prefer to use it as shown above, then we need to remove the static keyword from the function declaration, like...

...
async retrieveDataForYear(year:number): Promise<string> {
...
}

Decide how you want to utilize this function and make the necessary adjustments.

Answer 2

The function <code>retrieveDataForYear

is a static method based on the class definition of DataFetcher. To invoke it, we must call it directly using the class name, like...

const data: string = await DataFetcher.retrieveDataForYear(year);

If we prefer to use it as shown above, then we need to remove the static keyword from the function declaration, like...

...
async retrieveDataForYear(year:number): Promise<string> {
...
}

Decide how you want to utilize this function and make the necessary adjustments.

Type annotations for class methods are not being exported

Answer №1

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