Address Craig`s Suggestion

Co-authored-by: Craig Box <[email protected]>

Author: Ajay-singh1

layouts/partials/version-selector.html

@@ -1,26 +1,52 @@
 {{ $versions := site.Data.versions }}
 {{ $mainVerStr := $versions.main }}
+{{ $preliminaryVerStr := $versions.preliminary }}
 {{ $mainVerParts := split $mainVerStr "." }}
 {{ $major := index $mainVerParts 0 | int }}
 {{ $minor := index $mainVerParts 1 | int }}
 {{ $versionCount := 5 }}
 
+{{ if eq .Section "docs" }}
 <li class="main-navigation-links-item">
     <a href="#" class="main-navigation-links-link has-dropdown" aria-haspopup="true" aria-expanded="false">
         <span>Versions</span>
         {{ partial "icon.html" "dropdown-arrow" }}
     </a>
     <ul class="main-navigation-links-dropdown">
-        {{ range $i := seq 0 (sub $versionCount 1) }}
+
+        <!-- Preliminary version -->
+        {{ $preUrl := printf "https://preliminary.istio.io/v%s/docs" $preliminaryVerStr }}
+        <li class="main-navigation-links-dropdown-item">
+            <a href="{{ $preUrl }}"
+               class="main-navigation-links-link {{ if in $.Permalink "/preliminary/" }}active{{ end }}">
+                v{{ $preliminaryVerStr }} (Preliminary)
+            </a>
+        </li>
+
+        <!-- Main version -->
+        {{ $mainUrl := printf "https://istio.io/v%s/docs" $mainVerStr }}
+        <li class="main-navigation-links-dropdown-item">
+            <a href="{{ $mainUrl }}"
+               class="main-navigation-links-link {{ if in $.Permalink (print "/v" $mainVerStr "/") }}active{{ end }}">
+                v{{ $mainVerStr }} (Latest)
+            </a>
+        </li>
+
+        <!-- Previous versions -->
+        {{ range $i := seq 1 (sub $versionCount 1) }} <!-- start from 1 to skip main -->
         {{ $currentMinor := sub $minor $i }}
+        {{ if ge $currentMinor 0 }}
         {{ $ver := printf "v%d.%d" $major $currentMinor }}
         {{ $url := printf "https://istio.io/%s/docs" $ver }}
         <li class="main-navigation-links-dropdown-item">
-            <a href="{{ $url }}" class="main-navigation-links-link {{ if in $.Permalink (print " /" $ver) }}active{{ end
-                }}">
+            <a href="{{ $url }}"
+               class="main-navigation-links-link {{ if in $.Permalink (print "/" $ver "/") }}active{{ end }}">
                 {{ $ver }}
             </a>
         </li>
         {{ end }}
+        {{ end }}
+
     </ul>
-</li>
+</li>
+{{ end }}