How to use JS to find a value in a string and replace it and some more?

Question

JavaScript

There is a line site.ru/?reg=77&data=55
We need to find reg and replace everything between = and &

But the script must be universal, so that even if I need to replace the last value, for example date, then everything after equal must be replaced there /

How to implement it? Can't catch up.. and replace used and indexOf

Answer 1

const searchParams = new URLSearchParams(location.search);

searchParams.set('reg', 'new_value'); // Меняем данные
searchParams.delete('data'); // Удаляем данные

location.search = searchParams;