From cb63cd54f45a3e50d7d152de6e36761f63107562 Mon Sep 17 00:00:00 2001
From: Efremov Alexey <lexich121@gmail.com>
Date: Mon, 29 Nov 2021 13:47:23 +0300
Subject: [PATCH] feat: add support hash router

---
 index.d.ts |  4 +++-
 index.js   | 22 +++++++++++++++-------
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/index.d.ts b/index.d.ts
index abfb8b9..1bef559 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -94,9 +94,11 @@ export interface Router<AppPages extends Pages = Pages>
  * ```
  *
  * @param routes URL patterns.
+ * @param options (Optional) { hash?: boolean }
  */
 export function createRouter<AppPages extends Pages>(
-  routes: Routes<AppPages>
+  routes: Routes<AppPages>,
+  options?: { hash?: boolean }
 ): Router<AppPages>
 
 /**
diff --git a/index.js b/index.js
index ed5c8fe..e1e5186 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,13 @@
 import { atom, onMount } from 'nanostores'
 
-export function createRouter(routes) {
+export function createRouter(routes, options) {
   let router = atom()
+  let isHashRouter = options && options.hash;
+
+  let getPathname = isHashRouter
+    ? () => location.hash.replace(/^#\/?/, '')
+    : () => location.pathname
+
   router.routes = Object.keys(routes).map(name => {
     let value = routes[name]
     if (typeof value === 'string') {
@@ -75,20 +81,21 @@ export function createRouter(routes) {
   }
 
   let popstate = () => {
-    let page = parse(location.pathname)
+    let page = parse(getPathname())
     if (page !== false) set(page)
   }
 
   if (typeof window !== 'undefined' && typeof location !== 'undefined') {
     onMount(router, () => {
-      let page = parse(location.pathname)
+      let page = parse(getPathname())
       if (page !== false) set(page)
       document.body.addEventListener('click', click)
-      window.addEventListener('popstate', popstate)
+      let eventName = isHashRouter ? 'hashchange' : 'popstate'
+      window.addEventListener(eventName, popstate)
       return () => {
         prev = undefined
         document.body.removeEventListener('click', click)
-        window.removeEventListener('popstate', popstate)
+        window.removeEventListener(eventName, popstate)
       }
     })
   } else {
@@ -99,10 +106,11 @@ export function createRouter(routes) {
     let page = parse(path)
     if (page !== false) {
       if (typeof history !== 'undefined') {
+        let pageFix = isHashRouter ? '#' + path : path
         if (redirect) {
-          history.replaceState(null, null, path)
+          history.replaceState(null, null, pageFix)
         } else {
-          history.pushState(null, null, path)
+          history.pushState(null, null, pageFix)
         }
       }
       set(page)