Use native pseudo-selectors instead of jQuery selectors (#24713)

docs/4.0/components/alerts.md

@@ -73,7 +73,7 @@ You can see this in action with a live demo:
 Enable dismissal of an alert via JavaScript:
 
 {% highlight js %}
-$(".alert").alert()
+$('.alert').alert()
 {% endhighlight %}
 
 Or with `data` attributes on a button **within the alert**, as demonstrated above:

docs/4.0/components/list-group.md

@@ -254,9 +254,9 @@ You can activate individual list item in several ways:
 
 {% highlight js %}
 $('#myList a[href="#profile"]').tab('show') // Select tab by name
-$('#myList a:first').tab('show') // Select first tab
-$('#myList a:last').tab('show') // Select last tab
-$('#myList li:eq(2) a').tab('show') // Select third tab (0-indexed)
+$('#myList a:first-child').tab('show') // Select first tab
+$('#myList a:last-child').tab('show') // Select last tab
+$('#myList a:nth-child(3)').tab('show') // Select third tab
 {% endhighlight %}
 
 ### Fade effect
@@ -295,7 +295,7 @@ Activates a list item element and content container. Tab should have either a `d
 
 <script>
   $(function () {
-    $('#myList a:last').tab('show')
+    $('#myList a:last-child').tab('show')
   })
 </script>
 {% endhighlight %}

docs/4.0/components/navs.md

@@ -522,9 +522,9 @@ You can activate individual tabs in several ways:
 
 {% highlight js %}
 $('#myTab a[href="#profile"]').tab('show') // Select tab by name
-$('#myTab a:first').tab('show') // Select first tab
-$('#myTab a:last').tab('show') // Select last tab
-$('#myTab li:eq(2) a').tab('show') // Select third tab (0-indexed)
+$('#myTab li:first-child a').tab('show') // Select first tab
+$('#myTab li:last-child a').tab('show') // Select last tab
+$('#myTab li:nth-child(3) a').tab('show') // Select third tab
 {% endhighlight %}
 
 ### Fade effect
@@ -574,7 +574,7 @@ Activates a tab element and content container. Tab should have either a `data-ta
 
 <script>
   $(function () {
-    $('#myTab a:last').tab('show')
+    $('#myTab li:last-child a').tab('show')
   })
 </script>
 {% endhighlight %}