[@types/query-string]

If you know how to fix the issue, make a pull request instead.

• I tried using the @types/query-string package and had problems.
• I tried using the latest stable version of tsc. https://www.npmjs.com/package/typescript
• I have a question that is inappropriate for StackOverflow. (Please ask any appropriate questions there).
• Mention the authors (see Definitions by: in index.d.ts) so they can respond.
  • Authors: @SamVerschueren @tkrotoff @huhuanming @MadaraUchiha @shssoichiro

Just a small improvement suggestion.

export interface OutputParams {
  [key: string]: string | string[] | undefined;
}

export function parse<T = OutputParams>(str: string, options?: ParseOptions): T;
export function parseUrl<T = OutputParams>(str: string, options?: ParseOptions): {url: string, query: T};

Usage example:

type MyQuery = {
  foo: string;
  bar: string;
}

const query = qs.parse<MyQuery>(location.search);

And the IDE can suggest the query object's properties.

Start with the @types/query-string index.d.ts definition mentioned in the issue and inspect the current parse and parseUrl declarations. Add the proposed generic query type signatures so callers can provide MyQuery and receive typed properties; confirm the declarations match the usage example.