From b26bf0320cf3ec8a3400a70b2dc481d511ff2563 Mon Sep 17 00:00:00 2001
From: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Date: Sun, 19 Jun 2022 23:12:38 +0100
Subject: [PATCH] Add underscore.js to the sphinx13 theme (#10588)

---
 .../sphinx13/static/_sphinx_javascript_frameworks_compat.js  | 5 +++++
 doc/conf.py                                                  | 4 +++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/doc/_themes/sphinx13/static/_sphinx_javascript_frameworks_compat.js b/doc/_themes/sphinx13/static/_sphinx_javascript_frameworks_compat.js
index fc4ad89b3bf..8549469dc29 100644
--- a/doc/_themes/sphinx13/static/_sphinx_javascript_frameworks_compat.js
+++ b/doc/_themes/sphinx13/static/_sphinx_javascript_frameworks_compat.js
@@ -9,6 +9,11 @@
  *
  */
 
+/**
+ * select a different prefix for underscore
+ */
+$u = _.noConflict();
+
 
 /**
  * small helper function to urldecode strings
diff --git a/doc/conf.py b/doc/conf.py
index 8fe5d30e3a0..4afd5e63c13 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -181,7 +181,9 @@ def setup(app):
     # Load jQuery and patches to make readthedocs-doc-embed.js available (refs: #10574)
     app.add_js_file('https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js',
                     priority=100)
-    app.add_js_file('_sphinx_javascript_frameworks_compat.js', priority=200)
+    app.add_js_file('https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.13.1/underscore-min.js',  # NoQA
+                    priority=100)
+    app.add_js_file('_sphinx_javascript_frameworks_compat.js', priority=105)
 
     # workaround for RTD
     from sphinx.util import logging