FIX: Consistency with HTML anchors

app/assets/javascripts/discourse/lib/lock-on.js.es6

@@ -42,6 +42,9 @@ export default class LockOn {
   clearLock(interval) {
     $('body,html').off(SCROLL_EVENTS);
     clearInterval(interval);
+    if (this.options.finished) {
+      this.options.finished();
+    }
   }
 
   lock() {

app/assets/javascripts/discourse/lib/offset-calculator.js.es6

@@ -19,6 +19,8 @@ export default function offsetCalculator(y) {
   const ideal = headerHeight + ((expectedOffset < 0) ? 0 : expectedOffset);
 
   const $container = $('.posts-wrapper');
+  if ($container.length === 0) { return expectedOffset; }
+
   const topPos = $container.offset().top;
 
   const scrollTop = y || $(window).scrollTop();

app/assets/javascripts/discourse/lib/static-route-builder.js.es6

@@ -1,5 +1,5 @@
-import DiscourseURL from 'discourse/lib/url';
 import StaticPage from 'discourse/models/static-page';
+import { default as DiscourseURL, jumpToElement } from 'discourse/lib/url';
 
 const configs = {
   "faq": "faq_url",
@@ -23,8 +23,7 @@ export default function(page) {
 
     activate() {
       this._super();
-      // Scroll to an element if exists
-      DiscourseURL.scrollToId(document.location.hash);
+      jumpToElement(document.location.hash.substr(1));
     },
 
     model() {

app/assets/javascripts/discourse/lib/url.js.es6

@@ -2,16 +2,28 @@ import offsetCalculator from 'discourse/lib/offset-calculator';
 import LockOn from 'discourse/lib/lock-on';
 import { defaultHomepage } from 'discourse/lib/utilities';
 
-let _jumpScheduled = false;
 const rewrites = [];
-
 const TOPIC_REGEXP = /\/t\/([^\/]+)\/(\d+)\/?(\d+)?/;
 
+let _jumpScheduled = false;
+export function jumpToElement(elementId) {
+  if (_jumpScheduled || Ember.isEmpty(elementId)) { return; }
+
+  const selector = `#${elementId}, a[name=${elementId}]`;
+  _jumpScheduled = true;
+  Ember.run.schedule('afterRender', function() {
+    const lockon = new LockOn(selector, {
+      finished() {
+        _jumpScheduled = false;
+      }
+    });
+    lockon.lock();
+  });
+}
+
 const DiscourseURL = Ember.Object.extend({
 
-  // Used for matching a topic
-
-  isJumpScheduled: function() {
+  isJumpScheduled() {
     return _jumpScheduled;
   },
 
@@ -56,13 +68,8 @@ const DiscourseURL = Ember.Object.extend({
     });
   },
 
-  /**
-    Browser aware replaceState. Will only be invoked if the browser supports it.
-
-    @method replaceState
-    @param {String} path The path we are replacing our history state with.
-  **/
-  replaceState: function(path) {
+  // Browser aware replaceState. Will only be invoked if the browser supports it.
+  replaceState(path) {
     if (window.history &&
         window.history.pushState &&
         window.history.replaceState &&
@@ -81,23 +88,6 @@ const DiscourseURL = Ember.Object.extend({
     }
   },
 
-  // Scroll to the same page, different anchor
-  scrollToId(id) {
-    if (Em.isEmpty(id)) { return; }
-
-    _jumpScheduled = true;
-    Em.run.schedule('afterRender', function() {
-      let $elem = $(id);
-      if ($elem.length === 0) {
-        $elem = $("[name='" + id.replace('#', '') + "']");
-      }
-      if ($elem.length > 0) {
-        $('html,body').scrollTop($elem.offset().top - $('header').height() - 15);
-        _jumpScheduled = false;
-      }
-    });
-  },
-
   routeToTag(a) {
     if (a && a.host !== document.location.host) {
       document.location = a.href;
@@ -131,10 +121,10 @@ const DiscourseURL = Ember.Object.extend({
     }
 
     // Scroll to the same page, different anchor
-    if (path.indexOf('#') === 0) {
-      this.scrollToId(path);
-      this.replaceState(path);
-      return;
+    const m = /#(.+)$/.exec(path);
+    if (m) {
+      jumpToElement(m[1]);
+      return this.replaceState(path);
     }
 
     const oldPath = window.location.pathname;
@@ -299,7 +289,7 @@ const DiscourseURL = Ember.Object.extend({
 
   // Get a controller. Note that currently it uses `__container__` which is not
   // advised but there is no other way to access the router.
-  controllerFor: function(name) {
+  controllerFor(name) {
     return Discourse.__container__.lookup('controller:' + name);
   },
 
@@ -307,7 +297,7 @@ const DiscourseURL = Ember.Object.extend({
     Be wary of looking up the router. In this case, we have links in our
     HTML, say form compiled markdown posts, that need to be routed.
   **/
-  handleURL: function(path, opts) {
+  handleURL(path, opts) {
     opts = opts || {};
 
     const router = this.get('router');
@@ -328,19 +318,7 @@ const DiscourseURL = Ember.Object.extend({
 
     const transition = router.handleURL(path);
     transition._discourse_intercepted = true;
-    transition.promise.then(function() {
-      if (elementId) {
-
-        _jumpScheduled = true;
-        Em.run.next('afterRender', function() {
-          const offset = $('#' + elementId).offset();
-          if (offset && offset.top) {
-            $('html, body').scrollTop(offset.top - $('header').height() - 10);
-            _jumpScheduled = false;
-          }
-        });
-      }
-    });
+    transition.promise.then(() => jumpToElement(elementId));
   }
 }).create();