Convert Complex Object to Query String

How can I convert complex Object to a Query String intended for WebApi:

export enum FilterCondition {
    Equal,
    NotEqual,
    GreaterThan,
    LessThan,
    GreaterThanEqual,
    LessThanEqual
}

export class QueryParameter {
    propertyName: string;
    filterCondition: FilterCondition
    value: string;
}

export class QueryOptions {
    queryParameters: QueryParameter[] = new Array<QueryParameter>();
}

I'm trying to write a generic function to convert a complex type to basic query I wrote this function to convert a simple object to query string

export class QueryStringBuilder {
    static BuildParametersFromSearch<T>(obj: T): URLSearchParams {
        let params: URLSearchParams = new URLSearchParams();

        const objectKeys = Object.keys(obj) as Array<keyof T>;
        for (let key of objectKeys) {
            params.set(key, obj[key])
        }

        return params;
    }
}

But I'm having trouble grasping how I can do this recursively for complex object with enums and arrays etc? Can anyone point me in the right direction or to something build in that already does this?