[3.0.x] Refs #31493 -- Replaced var with const/let in documentation JS.

Backport of 2afa61e7d99b2ff2656dc64b6e28db88baf786a4 from master

Co-authored-by: Carlton Gibson <carlton.gibson@noumenal.es>

2 files changed, 8 insertions, 8 deletions

diff --git a/docs/ref/csrf.txt b/docs/ref/csrf.txt
index 20a8ddb433..0e4423248d 100644
--- a/docs/ref/csrf.txt
+++ b/docs/ref/csrf.txt
@@ -85,11 +85,11 @@ You can acquire the token like this:
 .. code-block:: javascript
 
     function getCookie(name) {
-        var cookieValue = null;
+        let cookieValue = null;
         if (document.cookie && document.cookie !== '') {
-            var cookies = document.cookie.split(';');
-            for (var i = 0; i < cookies.length; i++) {
-                var cookie = cookies[i].trim();
+            const cookies = document.cookie.split(';');
+            for (let i = 0; i < cookies.length; i++) {
+                const cookie = cookies[i].trim();
                 // Does this cookie string begin with the name we want?
                 if (cookie.substring(0, name.length + 1) === (name + '=')) {
                     cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
@@ -99,14 +99,14 @@ You can acquire the token like this:
         }
         return cookieValue;
     }
-    var csrftoken = getCookie('csrftoken');
+    const csrftoken = getCookie('csrftoken');
 
 The above code could be simplified by using the `JavaScript Cookie library
 <https://github.com/js-cookie/js-cookie/>`_ to replace ``getCookie``:
 
 .. code-block:: javascript
 
-    var csrftoken = Cookies.get('csrftoken');
+    const csrftoken = Cookies.get('csrftoken');
 
 .. note::
 
@@ -138,7 +138,7 @@ and read the token from the DOM with JavaScript:
     {% csrf_token %}
     <script type="text/javascript">
     // using jQuery
-    var csrftoken = jQuery("[name=csrfmiddlewaretoken]").val();
+    const csrftoken = jQuery("[name=csrfmiddlewaretoken]").val();
     </script>
 
 Setting the token on the AJAX request
diff --git a/docs/ref/templates/builtins.txt b/docs/ref/templates/builtins.txt
index 387ad09a83..ae62727266 100644
--- a/docs/ref/templates/builtins.txt
+++ b/docs/ref/templates/builtins.txt
@@ -1816,7 +1816,7 @@ The resulting data can be accessed in JavaScript like this:
 
 .. code-block:: javascript
 
-    var value = JSON.parse(document.getElementById('hello-data').textContent);
+    const value = JSON.parse(document.getElementById('hello-data').textContent);
 
 XSS attacks are mitigated by escaping the characters "<", ">" and "&". For
 example if ``value`` is ``{'hello': 'world</script>&amp;'}``, the output is: