diff --git a/eslint.config.js b/eslint.config.js
index eb9853b..221a135 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -6,5 +6,19 @@ export default [
     ignores: ['coverage', 'dist']
   },
   ...config,
-  ...ava
+  ...ava,
+  {
+    files: ['src/*.js'],
+    languageOptions: {
+      globals: {
+        window: 'readonly'
+      }
+    }
+  },
+  {
+    files: ['test/*.js'],
+    rules: {
+      'regexp/no-super-linear-backtracking': 'off'
+    }
+  }
 ];
diff --git a/src/routerrouter.js b/src/routerrouter.js
index fee6cdf..ed9e9a6 100644
--- a/src/routerrouter.js
+++ b/src/routerrouter.js
@@ -10,28 +10,40 @@ const extractParameters = (route, pathname) => {
 // Convert a route string into a regular expression suitable for matching
 // against the current location's `pathname`.
 const routeToRegExp = route => {
-  // escape RegExp reserved characters
-  route = route.replace(/[$.|]+?/g, '\\$&')
+  route = route
+    // escape RegExp reserved characters
+    .replaceAll(/[$.|]+/g, '\\$&')
     // replace optional parameters with RegExp
-    .replace(/\((.+?)\)/g, '(?:$1)?')
+    .replaceAll(/\((.+?)\)/g, '(?:$1)?')
     // replace named parameters with RegExp
-    .replace(/:\w+/g, '([^/]+)')
+    .replaceAll(/:\w+/g, '([^/]+)')
     // replace wildcard parameters with RegExp
-    .replace(/\*(\w+)?/g, '(.+?)');
+    .replaceAll(/\*(\w+)?/g, '(.+?)');
 
   return new RegExp(`^${route}$`);
 };
 
 export default class RouterRouter {
-  // Bind multiple routes to actions.
-  //
-  //   new RouterRouter({
-  //     routes: {
-  //       '/': () => {
-  //         console.log('This route matches the root URL');
-  //       },
-  //     }
-  //   });
+  /**
+   * Bind multiple routes to actions.
+   *
+   * @param {object} options An object containing a `routes` key whose value is
+   *   an object. Optionally contains arbitrary string keys whose values are
+   *   functions.
+   * @param {object} options.routes An object whose keys are strings
+   *   representing URLs to match against (which may contain named parameters,
+   *   wildcards, and optional parameters). Values may be either functions or
+   *   string values referencing keys in the `options` object.
+   *
+   * @example
+   * new RouterRouter({
+   *   routes: {
+   *     '/': () => {
+   *       console.log('This route matches the root URL');
+   *     },
+   *   }
+   * });
+   */
   constructor(options = {}) {
     this.options = options;
     this.location = window.location;
@@ -39,18 +51,24 @@ export default class RouterRouter {
     const routes = this.options.routes;
 
     if (routes) {
-      Object.keys(routes).forEach(route => {
-        return this.route(route, routes[route]);
-      });
+      for (const route of Object.keys(routes)) {
+        this.route(route, routes[route]);
+      }
     }
   }
 
-  // Manually bind a single route to an action.
-  //
-  //   router.route('/search/:query/:page', function(query, page) {
-  //     console.log(query, page);
-  //   });
-  //
+  /**
+   * Manually bind a single route to an action.
+   *
+   * @param {string|RegExp} route The URL to match.
+   * @param {Function} action A callback function to execute when `route`
+   *     matches the current page's URL.
+   *
+   * @example
+   * router.route('/search/:query/:page', (query, page) => {
+   *   console.log(query, page);
+   * });
+   */
   route(route, action) {
     const pathname = decodeURIComponent(this.location.pathname);