fix(BDropdown): set aria-disabled attr when disabled

Author: Steve Keay

packages/bootstrap-vue-next/src/components/BDropdown/BDropdownItem.vue

@@ -5,6 +5,7 @@
       class="dropdown-item"
       :class="computedClasses"
       :disabled="disabledBoolean"
+      :aria-disabled="disabledBoolean ? true : null"
       :aria-current="activeBoolean ? true : null"
       :href="tag === 'a' ? href : null"
       :rel="rel"

packages/bootstrap-vue-next/src/components/BDropdown/dropdown-item.spec.ts

@@ -148,6 +148,16 @@ describe('dropdown-item', () => {
     expect($button.attributes('disabled')).toBeUndefined()
   })
 
+  it('button has aria-disabled attr when prop disabled', async () => {
+    const wrapper = mount(BDropdownItem, {
+      props: {disabled: true},
+    })
+    const $button = wrapper.get('button')
+    expect($button.attributes('aria-disabled')).toBe('true')
+    await wrapper.setProps({disabled: false})
+    expect($button.attributes('aria-disabled')).toBeUndefined()
+  })
+
   it('button has aria-current attr when prop active', async () => {
     const wrapper = mount(BDropdownItem, {
       props: {active: true},