Removed the purging of the query parameters

assets/js/pagination.js

@@ -32,14 +32,22 @@ function button_press(){
     // On the first page, the stored continuation token is null.
     if (prev_ctoken === null) {
         sessionStorage.removeItem(CONT_CACHE_KEY);
-        window.location.href = window.location.href.split('?')[0];
+        let url = window.location.href.split('?')[0];
+        let params = window.location.href.split('?')[1];
+        let url_params = new URLSearchParams(params);
+        url_params.delete('continuation');
+        window.location.href = `${url}?${url_params.toString()}`;
 
         return;
     }
 
     sessionStorage.setItem(CONT_CACHE_KEY, JSON.stringify(prev_data));
+    let url = window.location.href.split('?')[0];
+    let params = window.location.href.split('?')[1];
+    let url_params = new URLSearchParams(params);
+    url_params.set("continuation", prev_ctoken);
 
-    window.location.href = `${window.location.pathname}?continuation=${prev_ctoken}`;
+    window.location.href = `${url}?${url_params.toString()}`;
 };
 
 addEventListener('DOMContentLoaded', function(){

src/invidious/frontend/pagination.cr

@@ -90,7 +90,7 @@ module Invidious::Frontend::Pagination
     end
   end
 
-  def nav_ctoken(locale : String?, *, base_url : String | URI, ctoken : String?, first_page : Bool)
+  def nav_ctoken(locale : String?, *, base_url : String | URI, ctoken : String?, first_page : Bool, params : URI::Params)
     return String.build do |str|
       str << %(<div class="h-box">\n)
       str << %(<div class="page-nav-container flexible">\n)
@@ -106,8 +106,8 @@ module Invidious::Frontend::Pagination
       str << %(<div class="page-next-container flex-right">)
 
       if !ctoken.nil?
-        params_next = URI::Params{"continuation" => ctoken}
-        url_next = HttpServer::Utils.add_params_to_url(base_url, params_next)
+        params["continuation"] = ctoken
+        url_next = HttpServer::Utils.add_params_to_url(base_url, params)
 
         self.next_page(str, locale, url_next.to_s)
       end

src/invidious/views/channel.ecr

@@ -22,6 +22,7 @@
     base_url: relative_url,
     ctoken: next_continuation,
     first_page: continuation.nil?,
+    params: env.params.query,
   )
 %>