current_url = new URL("http://localhost:8000/test.html?key1=links");
> URL {href: "http://localhost:8000/test.html?key1=links", origin: "http://localhost:8000", protocol: "http:", username: "", password: "", …}
current_url.search
> "?key1=links"

current_url.searchParams
> URLSearchParams {}
v = new URLSearchParams(current_url.search)
> URLSearchParams {}
v = new URLSearchParams("key1=links")
> URLSearchParams {}