Merge branch '26109-preserve-scroll-position-on-autoreload' into 'master'

Scroll to bottom on build completion if autoscroll was active

Closes #26109

See merge request !8391

2 files changed, 17 insertions, 2 deletions

diff --git a/app/assets/javascripts/build.js b/app/assets/javascripts/build.js
index bc13c46443a..fca47002870 100644
--- a/app/assets/javascripts/build.js
+++ b/app/assets/javascripts/build.js
@@ -5,6 +5,7 @@
 (function() {
   var bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
   var AUTO_SCROLL_OFFSET = 75;
+  var DOWN_BUILD_TRACE = '#down-build-trace';
 
   this.Build = (function() {
     Build.interval = null;
@@ -26,7 +27,7 @@
       this.$autoScrollStatus = $('#autoscroll-status');
       this.$autoScrollStatusText = this.$autoScrollStatus.find('.status-text');
       this.$upBuildTrace = $('#up-build-trace');
-      this.$downBuildTrace = $('#down-build-trace');
+      this.$downBuildTrace = $(DOWN_BUILD_TRACE);
       this.$scrollTopBtn = $('#scroll-top');
       this.$scrollBottomBtn = $('#scroll-bottom');
       this.$buildRefreshAnimation = $('.js-build-refresh');
@@ -91,6 +92,9 @@
         dataType: 'json',
         success: function(buildData) {
           $('.js-build-output').html(buildData.trace_html);
+          if (window.location.hash === DOWN_BUILD_TRACE) {
+            $("html,body").scrollTop(this.$buildTrace.height());
+          }
           if (removeRefreshStatuses.indexOf(buildData.status) >= 0) {
             this.$buildRefreshAnimation.remove();
             return this.initScrollMonitor();
@@ -105,6 +109,8 @@
         dataType: "json",
         success: (function(_this) {
           return function(log) {
+            var pageUrl;
+
             if (log.state) {
               _this.state = log.state;
             }
@@ -116,7 +122,12 @@
               }
               return _this.checkAutoscroll();
             } else if (log.status !== _this.buildStatus) {
-              return Turbolinks.visit(_this.pageUrl);
+              pageUrl = _this.pageUrl;
+              if (_this.$autoScrollStatus.data('state') === 'enabled') {
+                pageUrl += DOWN_BUILD_TRACE;
+              }
+
+              return Turbolinks.visit(pageUrl);
             }
           };
         })(this)
diff --git a/changelogs/unreleased/26109-preserve-scroll-position-on-autoreload.yml b/changelogs/unreleased/26109-preserve-scroll-position-on-autoreload.yml
new file mode 100644
index 00000000000..cde0d114d7c
--- /dev/null
+++ b/changelogs/unreleased/26109-preserve-scroll-position-on-autoreload.yml
@@ -0,0 +1,4 @@
+---
+title: Scroll to bottom on build completion if autoscroll was active
+merge_request: 8391
+author: