Improve Language Selector dropdowns

src/components/LanguageSelector.tsx

@@ -152,9 +152,13 @@ const LanguageSelector = () => {
 
   useEffect(() => {
     if (isOpen && focusedIndex >= 0) {
-      const element = document.querySelector(
-        `.selector__item:nth-child(${focusedIndex + 1})`
-      ) as HTMLElement;
+      const elements = Array.from(
+        document.querySelectorAll(".selector__item")
+      ) as HTMLElement[];
+      const focusableElements = elements.filter(
+        (el) => el.getAttribute("tabIndex") !== "-1"
+      );
+      const element = focusableElements[focusedIndex];
       element?.focus();
     }
   }, [isOpen, focusedIndex]);
@@ -186,43 +190,41 @@ const LanguageSelector = () => {
         </div>
         <span className="selector__arrow" />
       </button>
-      {isOpen && (
-        <ul
-          className="selector__dropdown"
-          role="listbox"
-          onKeyDown={handleKeyDown}
-          tabIndex={-1}
-        >
-          {fetchedLanguages.map((lang, index) =>
-            lang.subLanguages.length > 0 ? (
-              <SubLanguageSelector
-                key={lang.name}
-                opened={openedLanguages.includes(lang)}
-                parentLanguage={lang}
-                onDropdownToggle={handleToggleSubLanguage}
-                handleParentSelect={handleSelect}
-                afterSelect={afterSelect}
-              />
-            ) : (
-              <li
-                key={lang.name}
-                role="option"
-                tabIndex={-1}
-                onClick={() => handleSelect(lang)}
-                className={`selector__item ${
-                  language.name === lang.name ? "selected" : ""
-                } ${focusedIndex === index ? "focused" : ""}`}
-                aria-selected={language.name === lang.name}
-              >
-                <label>
-                  <img src={lang.icon} alt="" />
-                  <span>{lang.name}</span>
-                </label>
-              </li>
-            )
-          )}
-        </ul>
-      )}
+      <ul
+        className={`selector__dropdown ${isOpen ? "" : " hidden"}`}
+        role="listbox"
+        onKeyDown={handleKeyDown}
+        tabIndex={0}
+      >
+        {fetchedLanguages.map((lang, index) =>
+          lang.subLanguages.length > 0 ? (
+            <SubLanguageSelector
+              key={lang.name}
+              opened={openedLanguages.includes(lang)}
+              parentLanguage={lang}
+              onDropdownToggle={handleToggleSubLanguage}
+              handleParentSelect={handleSelect}
+              afterSelect={afterSelect}
+            />
+          ) : (
+            <li
+              key={lang.name}
+              role="option"
+              tabIndex={0}
+              onClick={() => handleSelect(lang)}
+              className={`selector__item ${
+                language.name === lang.name ? "selected" : ""
+              } ${focusedIndex === index ? "focused" : ""}`}
+              aria-selected={language.name === lang.name}
+            >
+              <label>
+                <img src={lang.icon} alt="" />
+                <span>{lang.name}</span>
+              </label>
+            </li>
+          )
+        )}
+      </ul>
     </div>
   );
 };

src/components/SubLanguageSelector.tsx

@@ -47,7 +47,7 @@ const SubLanguageSelector = ({
     <>
       <li
         role="option"
-        tabIndex={-1}
+        tabIndex={0}
         className={`selector__item ${
           subLanguage === defaultSlugifiedSubLanguageName &&
           language.name === parentLanguage.name
@@ -78,24 +78,24 @@ const SubLanguageSelector = ({
         </label>
       </li>
 
-      {opened &&
-        parentLanguage.subLanguages.map((sl) => (
-          <li
-            key={sl.name}
-            role="option"
-            tabIndex={-1}
-            className={`selector__item sublanguage__item ${
-              slugify(subLanguage) === slugify(sl.name) ? "selected" : ""
-            }`}
-            aria-selected={slugify(subLanguage) === slugify(sl.name)}
-            onClick={handleSubLanguageSelect(sl)}
-          >
-            <label>
-              <img src={sl.icon} alt={sl.name} />
-              <span>{sl.name}</span>
-            </label>
-          </li>
-        ))}
+      {parentLanguage.subLanguages.map((sl) => (
+        <li
+          key={sl.name}
+          role="option"
+          tabIndex={opened ? 0 : -1}
+          aria-disabled={!opened}
+          className={`selector__item sublanguage__item ${opened ? "" : "hidden"} ${
+            slugify(subLanguage) === slugify(sl.name) ? "selected" : ""
+          }`}
+          aria-selected={slugify(subLanguage) === slugify(sl.name)}
+          onClick={handleSubLanguageSelect(sl)}
+        >
+          <label>
+            <img src={sl.icon} alt={sl.name} />
+            <span>{sl.name}</span>
+          </label>
+        </li>
+      ))}
     </>
   );
 };

src/styles/main.css

@@ -400,7 +400,7 @@ abbr {
   border-left: 7px solid transparent;
   border-right: 7px solid transparent;
   border-top: 7px solid var(--clr-text-primary); /* [1] */
-  transition: transform 100ms ease;
+  transition: transform 300ms ease;
 }
 
 .selector--open .selector__arrow {
@@ -413,7 +413,7 @@ abbr {
 
   position: absolute;
   width: 100%;
-  max-height: 20rem;
+  height: 50vh;
   overflow-y: auto;
 
   background-color: var(--clr-bg-secondary);
@@ -426,10 +426,28 @@ abbr {
 
   box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
   z-index: 1;
+  transition: all 300ms ease;
 }
 
-.selector__dropdown:focus-within {
-  border-color: var(--clr-accent);
+.selector__dropdown.hidden {
+  border: none;
+  padding: 0;
+  height: 0;
+  opacity: 0;
+  overflow: hidden;
+}
+
+.selector__dropdown::-webkit-scrollbar {
+  width: 8px;
+}
+
+.selector__dropdown::-webkit-scrollbar-thumb {
+  background: var(--scrollbar-thumb);
+  border-radius: 4px;
+}
+
+.selector__dropdown::-webkit-scrollbar-thumb:hover {
+  background: var(--scrollbar-thumb);
 }
 
 .selector__item {
@@ -439,10 +457,19 @@ abbr {
   gap: 1rem;
   align-items: center;
   border-radius: var(--br-md);
+  transition: all 300ms ease;
 }
 
 .sublanguage__item {
+  height: 3rem;
   margin-left: 1.5rem;
+  transition: all 300ms ease;
+}
+
+.sublanguage__item.hidden {
+  height: 0;
+  opacity: 0;
+  overflow: hidden;
 }
 
 .sublanguage__button{
@@ -462,6 +489,11 @@ abbr {
   transform: rotate(-90deg);
   transition: transform 100ms ease;
   cursor: pointer;
+  transition: all 200ms ease;
+}
+
+.sublanguage__arrow:hover {
+  border-top-color: var(--clr-accent);
 }
 
 [aria-expanded="true"] .sublanguage__arrow {
@@ -472,6 +504,10 @@ abbr {
   border-top-color: var(--clr-text-tertiary);
 }
 
+.selector__item.selected .sublanguage__arrow:hover {
+  border-top-color: var(--clr-text-primary);
+}
+
 .selector__item label {
   width: 100%;
   padding: 0.25em 0.75em;