fix version selector for core/stdlib

src/ApiDocs.res

@@ -172,6 +172,11 @@ module SidebarTree = {
             ReactEvent.Form.preventDefault(evt)
             let version = (evt->ReactEvent.Form.target)["value"]
             let url = Url.parse(router.asPath)
+            if version < "v12.0.0" {
+              url.pagepath[1] = "core"
+            } else {
+              url.pagepath[1] = "stdlib"
+            }
 
             let targetUrl =
               "/" ++

src/common/Constants.res

@@ -25,7 +25,8 @@ let nextVersion =
     ? None
     : Some(versions.next, versions.next->Semver.tryGetMajorString)
 
-let coreVersions = [latestVersion]
+let stdlibVersions =
+  versions.latest === "v11.0.0" ? [latestVersion] : [("v11.0.0", "v11"), latestVersion]
 
 let allReactVersions = [("latest", "v0.12.0"), ("v0.11.0", "v0.11.0"), ("v0.10.0", "v0.10.0")]
 

src/components/VersionSelect.res

@@ -26,7 +26,10 @@ let make = (
       <>
         <SectionHeader value=Constants.dropdownLabelNext />
         <option className="py-4" key=value value> {React.string(label)} </option>
-        <SectionHeader value=Constants.dropdownLabelReleased />
+        {switch availableVersions {
+        | [] => React.null
+        | _ => <SectionHeader value=Constants.dropdownLabelReleased />
+        }}
       </>
     }}
     {React.array(children)}