From 7631cc667966067be0d6efca7c217cf7cd173c7b Mon Sep 17 00:00:00 2001
From: Max Milton <max@wearegenki.com>
Date: Mon, 31 Jan 2022 17:41:03 +1000
Subject: [PATCH] feat: Allow useURLParams setter to take a function as the
 argument (#199)

---
 src/index.tsx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/index.tsx b/src/index.tsx
index 43fcd9d9..d40f41b1 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -171,11 +171,13 @@ export const useURLParams = (): [
    * @param params - The new URL search query params to set. Properties set as
    * `undefined` will not be included in the URL.
    */
-  (params: URLParams) => void,
+  (params: URLParams | ((prev: URLParams) => URLParams)) => void,
 ] => {
   const [params, set] = createSignal(decode(window.location.search.slice(1)));
 
-  const setParams = (urlParams: URLParams) => {
+  const setParams = (
+    urlParams: ((prev: URLParams) => URLParams) | URLParams,
+  ) => {
     window.history.replaceState(null, '', encode(set(urlParams), '?'));
   };