Add a docsref shortcode.

This allows for the build to fail if a reference isn't found.

site/content/docs/4.3/examples/album/index.html

@@ -203,6 +203,6 @@ extra_css:
       <a href="#">Back to top</a>
     </p>
     <p>Album example is &copy; Bootstrap, but please download and customize it for yourself!</p>
-    <p>New to Bootstrap? <a href="/">Visit the homepage</a> or read our <a href="/docs/{{< param docs_version >}}/getting-started/introduction/">getting started guide</a>.</p>
+    <p>New to Bootstrap? <a href="/">Visit the homepage</a> or read our <a href="{{< docsref "/getting-started/introduction" >}}">getting started guide</a>.</p>
   </div>
 </footer>

site/content/docs/4.3/examples/navbar-bottom/index.html

@@ -7,7 +7,7 @@ title: Bottom navbar example
   <div class="jumbotron mt-3">
     <h1>Bottom Navbar example</h1>
     <p class="lead">This example is a quick exercise to illustrate how the bottom navbar works.</p>
-    <a class="btn btn-lg btn-primary" href="/docs/{{< param docs_version >}}/components/navbar/" role="button">View navbar docs &raquo;</a>
+    <a class="btn btn-lg btn-primary" href="{{< docsref "/components/navbar" >}}" role="button">View navbar docs &raquo;</a>
   </div>
 </div>
 <nav class="navbar fixed-bottom navbar-expand-sm navbar-dark bg-dark">

site/content/docs/4.3/examples/navbar-fixed/index.html

@@ -33,6 +33,6 @@ extra_css:
   <div class="jumbotron">
     <h1>Navbar example</h1>
     <p class="lead">This example is a quick exercise to illustrate how fixed to top navbar works. As you scroll, it will remain fixed to the top of your browser’s viewport.</p>
-    <a class="btn btn-lg btn-primary" href="/docs/{{< param docs_version >}}/components/navbar/" role="button">View navbar docs &raquo;</a>
+    <a class="btn btn-lg btn-primary" href="{{< docsref "/components/navbar" >}}" role="button">View navbar docs &raquo;</a>
   </div>
 </main>

site/content/docs/4.3/examples/navbar-static/index.html

@@ -33,6 +33,6 @@ extra_css:
   <div class="jumbotron">
     <h1>Navbar example</h1>
     <p class="lead">This example is a quick exercise to illustrate how the top-aligned navbar works. As you scroll, this navbar remains in its original position and moves with the rest of the page.</p>
-    <a class="btn btn-lg btn-primary" href="/docs/{{< param docs_version >}}/components/navbar/" role="button">View navbar docs &raquo;</a>
+    <a class="btn btn-lg btn-primary" href="{{< docsref "/components/navbar" >}}" role="button">View navbar docs &raquo;</a>
   </div>
 </main>

site/content/docs/4.3/examples/navbars/index.html

@@ -313,10 +313,10 @@ extra_css:
     <div class="jumbotron">
       <div class="col-sm-8 mx-auto">
         <h1>Navbar examples</h1>
-        <p>This example is a quick exercise to illustrate how the navbar and its contents work. Some navbars extend the width of the viewport, others are confined within a <code>.container</code>. For positioning of navbars, checkout the <a href="/docs/{{< param docs_version >}}/examples/navbar-static/">top</a> and <a href="/docs/{{< param docs_version >}}/examples/navbar-fixed/">fixed top</a> examples.</p>
+        <p>This example is a quick exercise to illustrate how the navbar and its contents work. Some navbars extend the width of the viewport, others are confined within a <code>.container</code>. For positioning of navbars, checkout the <a href="{{< docsref "/examples/navbar-static" >}}">top</a> and <a href="{{< docsref "/examples/navbar-fixed" >}}">fixed top</a> examples.</p>
         <p>At the smallest breakpoint, the collapse plugin is used to hide the links and show a menu button to toggle the collapsed content.</p>
         <p>
-          <a class="btn btn-primary" href="/docs/{{< param docs_version >}}/components/navbar/" role="button">View navbar docs &raquo;</a>
+          <a class="btn btn-primary" href="{{< docsref "/components/navbar" >}}" role="button">View navbar docs &raquo;</a>
         </p>
       </div>
     </div>

site/content/docs/4.3/examples/sticky-footer-navbar/index.html

@@ -39,7 +39,7 @@ body_class: "d-flex flex-column h-100"
   <div class="container">
     <h1 class="mt-5">Sticky footer with fixed navbar</h1>
     <p class="lead">Pin a footer to the bottom of the viewport in desktop browsers with this custom HTML and CSS. A fixed navbar has been added with <code>padding-top: 60px;</code> on the <code>main &gt; .container</code>.</p>
-    <p>Back to <a href="/docs/{{< param docs_version >}}/examples/sticky-footer/">the default sticky footer</a> minus the navbar.</p>
+    <p>Back to <a href="{{< docsref "/examples/sticky-footer" >}}">the default sticky footer</a> minus the navbar.</p>
   </div>
 </main>
 

site/content/docs/4.3/examples/sticky-footer/index.html

@@ -13,7 +13,7 @@ include_js: false
   <div class="container">
     <h1 class="mt-5">Sticky footer</h1>
     <p class="lead">Pin a footer to the bottom of the viewport in desktop browsers with this custom HTML and CSS.</p>
-    <p>Use <a href="/docs/{{< param docs_version >}}/examples/sticky-footer-navbar/">the sticky footer with a fixed navbar</a> if need be, too.</p>
+    <p>Use <a href="{{< docsref "/examples/sticky-footer-navbar" >}}">the sticky footer with a fixed navbar</a> if need be, too.</p>
   </div>
 </main>