diff --git a/content/install-hook-userstylesworld.js b/content/install-hook-userstylesworld.js
index cb067158..6644eb37 100644
--- a/content/install-hook-userstylesworld.js
+++ b/content/install-hook-userstylesworld.js
@@ -18,12 +18,8 @@
       sendPostMessage({type: 'usw-remove-stylus-button'});
 
       if (location.pathname === '/api/oauth/style/new') {
-        // Gets the search query string, and get the vendor_data from it.
-        // Which is the id of the style that shall be linked with.
-        const vendorData = window.location.search.split('&')
-          .find(query => query.startsWith('vendor_data'))
-          .split('=')[1];
-        API.styles.get(Number(vendorData)).then(style => {
+        const styleId = Number(new URLSearchParams(location.search).get('vendor_data'));
+        API.styles.get(styleId).then(style => {
           style.sourceCode = style.tmpSourceCode;
           sendPostMessage({type: 'usw-fill-new-style', data: style});
         });