How to pass an array within a query string in HttpClient?

Question

This is my array of actors:

[\'Elvis\', \'Jane\', \'Frances\']

How to pass this array within a query strin

Answer 1

I've used this method and it worked for me in Angular 10:

private paramMaker(data) : HttpParams
{
    let httpParams = new HttpParams();
    Object.keys(data).forEach((key) = > {
        if (Array.isArray(data[key]))
        {
            data[key].forEach((item, index) = > {
                httpParams = httpParams.append(key + '[' + index + ']', item);
            });
        }
        else
        {
            httpParams = httpParams.append(key, data[key]);
        }
    });
    return httpParams;
}