Newbee question: parse and change an URL string

[Christophe HOARAU]

Hi,

I wanted to use Url (https://nodejs.org/api/url.html) in order to parse a string url and then be able to change/add some query parameters. But when I try to change my URL object with url.query.myParam = "maValue" and then when I'm using Url.format I don't have my new parameter.
I have seen several properties on the URL object which contains redundant information. What is the one I have to update for my needs ?

Thanks a lot.
Best regards.