(#478) navigo router: fixed reverse routing for certain base URLs

Author: x1B

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Last Changes
 
+- [#478](https://github.com/LaxarJS/laxar/issues/478): navigo router: fixed reverse routing for certain base URLs
 - [#469](https://github.com/LaxarJS/laxar/issues/469): flow: fixed `constructAbsoluteUrl` to not lose active place parameters
 - [#472](https://github.com/LaxarJS/laxar/issues/472): bootstrapping: fixed a race condition that sometimes caused initialization to get stuck indefinitely
 - [#470](https://github.com/LaxarJS/laxar/issues/470): project: upgrade to webpack 3

lib/runtime/navigo_router.js

@@ -217,7 +217,14 @@ export function create( browser, configuration, Navigo = NavigoImplementation )
     * @memberof NavigoRouter
     */
    function constructAbsoluteUrl( patterns, parameters, fragment = null ) {
-      return router.link( ( useHash ? hash : '' ) + constructPath( patterns, parameters, fragment ) );
+      const path = constructPath( patterns, parameters, fragment );
+      const url = router.link( ( useHash ? hash : '' ) + path );
+
+      // peculiarity in Navigo: hash inserted twice if base ends with `/` (LaxarJS/laxar#478)
+      const brokenSuffix = `/${hash}${hash}${path}`;
+      return useHash && endsWith( url, brokenSuffix ) ?
+         `${url.slice( 0, url.lastIndexOf( brokenSuffix ) )}/${hash}${path}` :
+         url;
    }
 
    ///////////////////////////////////////////////////////////////////////////////////////////////////////////