Improve Accessibility of Components

src/app/components/dropdown/dropdown.html

@@ -7,11 +7,12 @@
 </div>
 
 @if (isOpen()) {
-  <ul class="dropdown-list" role="listbox">
+  <ul class="dropdown-list" role="listbox" [id]="dropdownId + '-listbox'">
     @for (option of normalizedOptions(); track option.value; let i = $index) {
       <li
         class="dropdown-item"
         role="option"
+        [id]="dropdownId + '-option-' + i"
         [class.selected]="option.value === value()"
         [class.focused]="i === focusedIndex()"
         [attr.aria-selected]="option.value === value()"

src/app/components/dropdown/dropdown.ts

@@ -17,6 +17,9 @@ export interface DropdownOption {
     'role': 'combobox',
     'aria-haspopup': 'listbox',
     '[attr.aria-expanded]': 'isOpen()',
+    '[attr.aria-controls]': "isOpen() ? dropdownId + '-listbox' : null",
+    '[attr.aria-activedescendant]': "isOpen() && focusedIndex() >= 0 ? dropdownId + '-option-' + focusedIndex() : null",
+    '[attr.aria-label]': 'ariaLabel()',
     '[class.open]': 'isOpen()',
     'tabindex': '0',
     '(click)': 'toggle()',
@@ -30,6 +33,7 @@ export interface DropdownOption {
 export class Dropdown {
   options = input<Array<DropdownOption | string>>([]);
   placeholder = input<string>('Select an option');
+  ariaLabel = input<string | undefined>(undefined);
   icon = input<string>();
   value = model<any>(null);
   selectionChange = output<any>();
@@ -37,6 +41,9 @@ export class Dropdown {
   isOpen = signal(false);
   focusedIndex = signal(-1);
 
+  private static nextId = 0;
+  dropdownId = `dropdown-${Dropdown.nextId++}`;
+
   constructor(private el: ElementRef) {}
 
   normalizedOptions = computed(() => {
@@ -96,7 +103,10 @@ export class Dropdown {
       this.toggle();
       return;
     }
-    this.focusedIndex.update(i => (i + 1) % this.normalizedOptions().length);
+    this.focusedIndex.update(i => {
+      if (i === -1) return 0;
+      return (i + 1) % this.normalizedOptions().length;
+    });
   }
 
   onArrowUp(event: Event) {
@@ -105,7 +115,10 @@ export class Dropdown {
       this.toggle();
       return;
     }
-    this.focusedIndex.update(i => (i - 1 + this.normalizedOptions().length) % this.normalizedOptions().length);
+    this.focusedIndex.update(i => {
+      if (i <= 0) return this.normalizedOptions().length - 1;
+      return i - 1;
+    });
   }
 
   @HostListener('document:click', ['$event'])

src/app/components/switch/switch.html

@@ -1 +1 @@
-<div class="switch-knob"></div>
+<div class="switch-knob" aria-hidden="true"></div>

src/app/components/switch/switch.ts

@@ -1,4 +1,4 @@
-import { Component, input, model, output } from '@angular/core'
+import { Component, input, model, output } from '@angular/core';
 
 @Component({
   selector: 'switch',
@@ -6,28 +6,28 @@ import { Component, input, model, output } from '@angular/core'
   templateUrl: './switch.html',
   styleUrl: './switch.scss',
   host: {
-    'role': 'switch',
-    'tabindex': '0',
+    role: 'switch',
+    tabindex: '0',
     '[attr.aria-checked]': 'isActive()',
     '[class.active]': 'isActive()',
     '[class.reduce-motion]': 'reduceMotion()',
     '(click)': 'onClick()',
     '(keydown.enter)': 'onClick()',
-    '(keydown.space)': 'onSpaceDown($event)'
-  }
+    '(keydown.space)': 'onSpaceDown($event)',
+  },
 })
 export class Switch {
   isActive = model<boolean>(false);
   reduceMotion = input<boolean>(
     typeof window !== 'undefined'
       ? window.matchMedia('(prefers-reduced-motion: reduce)').matches
-      : false
+      : false,
   );
-  toggle = output<boolean>()
+  toggle = output<boolean>();
 
   onClick(): void {
-    this.isActive.update(value => !value)
-    this.onToggle()
+    this.isActive.update((value) => !value);
+    this.onToggle();
   }
 
   onSpaceDown(event: Event): void {
@@ -36,6 +36,6 @@ export class Switch {
   }
 
   onToggle(): void {
-    this.toggle.emit(this.isActive())
+    this.toggle.emit(this.isActive());
   }
 }

src/styles.scss

@@ -1,8 +1,9 @@
-C@import url('https://cdn.jsdelivr.net/npm/nanumsquareneo@0.0.5/nanumsquareneo.css');
+@import url('https://cdn.jsdelivr.net/npm/nanumsquareneo@0.0.5/nanumsquareneo.css');
 @import url('https://cdn.jsdelivr.net/gh/wanteddev/wanted-sans@v1.0.1/packages/wanted-sans/fonts/webfonts/variable/split/WantedSansVariable.min.css');
+@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard-jp-dynamic-subset.min.css");
 
 body {
-  font-family: 'NanumSquareNeo', 'Wanted Sans Variable', sans-serif;
+  font-family: 'NanumSquareNeo', 'Wanted Sans Variable', 'Pretendard JP', sans-serif;
   font-weight: 500;
   margin: 0;
 }