url_for helper: Don't prepend root if url is started with #

Fix #1708

Author: tommy351

lib/plugins/helper/url_for.js

@@ -6,6 +6,10 @@ var _ = require('lodash');
 function urlForHelper(path, options) {
   path = path || '/';
 
+  if (path[0] === '#' || path.substring(0, 2) === '//') {
+    return path;
+  }
+
   var config = this.config;
   var root = config.root;
   var data = url.parse(path);
@@ -15,7 +19,7 @@ function urlForHelper(path, options) {
   }, options);
 
   // Exit if this is an external path
-  if (data.protocol || path.substring(0, 2) === '//') {
+  if (data.protocol) {
     return path;
   }
 

test/scripts/helpers/url_for.js

@@ -52,4 +52,8 @@ describe('url_for', function() {
       urlFor(url).should.eql(url);
     });
   });
+
+  it('only hash', function() {
+    urlFor('#test').should.eql('#test');
+  });
 });