Revert "Rename latestVersion to isStale and use boolean"

This reverts commit 8ef47f0.

Author: alisinabh

assets/js/handlebars/templates/versions-dropdown.handlebars

@@ -2,11 +2,11 @@
   <label>
     <span class="sidebar-projectVersionsDropdownCaret" aria-hidden="true">&#x25bc;</span>
     <span class="sr-only">Project version</span>
-    {{#if isStale}}
+    {{#if latestVersion}}
       <i class="ri-alert-line sidebar-staleIcon" aria-hidden="true"></i>
       <span class="sr-only">This version is not the latest version of the package</span>
     {{/if}}
-    <select class="sidebar-projectVersionsDropdown{{#if isStale}} sidebar-staleVersion{{/if}}"{{#if isStale}} title="This version is not the latest version of the package"{{/if}}>
+    <select class="sidebar-projectVersionsDropdown{{#if latestVersion}} sidebar-staleVersion{{/if}}"{{#if latestVersion}} title="This version is not the latest version of the package."{{/if}}>
       {{#each nodes}}
         <option translate="no" value="{{url}}"{{#if isCurrentVersion}} selected disabled{{/if}}>
           {{version}}

assets/js/sidebar/sidebar-version-select.js

@@ -17,17 +17,17 @@ export function initialize () {
     const currentVersion = versionsContainer.textContent.trim()
 
     const latestVersionNode = versionNodes.find(node => node.latest)
-    const isStale = latestVersionNode?.version !== currentVersion
+    const latestVersion = latestVersionNode?.version !== currentVersion ? latestVersionNode?.version : null
 
     const nodes = decorateVersionNodes(versionNodes, currentVersion)
 
-    renderVersionsDropdown({ nodes, isStale })
+    renderVersionsDropdown({ nodes, latestVersion })
   }
 }
 
-function renderVersionsDropdown ({ nodes, isStale }) {
+function renderVersionsDropdown ({ nodes, latestVersion }) {
   const versionsContainer = qs(VERSIONS_CONTAINER_SELECTOR)
-  const versionsDropdownHtml = versionsDropdownTemplate({ nodes, isStale })
+  const versionsDropdownHtml = versionsDropdownTemplate({ nodes, latestVersion })
   versionsContainer.innerHTML = versionsDropdownHtml
 
   qs(VERSIONS_DROPDOWN_SELECTOR).addEventListener('change', handleVersionSelected)