Theo's Typesafe Cult•15mo ago

constructing link with search parameters

So I have a navbar that links to a /results page. The situation is that if a user has preferences saved in localstorage, i want to embed those preferences within the link as search params like /results?sports=true&... currently, i have

  const appendParams = (path: PagePaths): PagePaths => {
    const searchParams = new URLSearchParams();

    defaultPreferences.forEach((pref) => {
      searchParams.append(pref, "true");
    });

    return `${path}?${searchParams.toString()}` as PagePaths;
  };

  const pages: Record<string, PageLink> = {
    home: { title: "Home", href: "/" },
    search: { title: "New Preferences", href: "/search" },
    results: {
      title: "Default Preferences",
      href: appendParams("/results"),
    },
  };

  useEffect(() => {
    const savedPreferencesOrEmpty = localStorage.getItem("preferences") ?? "[]";

    setDefaultPreferences(() => JSON.parse(savedPreferencesOrEmpty));
  }, []);

  const appendParams = (path: PagePaths): PagePaths => {
    const searchParams = new URLSearchParams();

    defaultPreferences.forEach((pref) => {
      searchParams.append(pref, "true");
    });

    return `${path}?${searchParams.toString()}` as PagePaths;
  };

  const pages: Record<string, PageLink> = {
    home: { title: "Home", href: "/" },
    search: { title: "New Preferences", href: "/search" },
    results: {
      title: "Default Preferences",
      href: appendParams("/results"),
    },
  };

  useEffect(() => {
    const savedPreferencesOrEmpty = localStorage.getItem("preferences") ?? "[]";

    setDefaultPreferences(() => JSON.parse(savedPreferencesOrEmpty));
  }, []);

, which i think? will work. but i feel like this is hacky and not really the right way to handle it (primary concern is the appendParams function. any thoughts? originally i was going to construct a URL object and use the searchParams.append method on the object to add the params, but next's router doesn't have a function that returns the actual, non-relative, base path

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constructing link with search parameters