{{#if @value}}
  <button class="collapse-button" {{on "click" @action}}>
    <FaIcon @icon="minus" />
  </button>
{{else}}
  <button class="expand-button" {{on "click" @action}}>
    <FaIcon @icon="plus" />
  </button>
{{/if}}

{{#if @value}}
  <button
    class="collapse-button"
    {{on "click" @action}}
    aria-label={{@collapseButtonLabel}}
  >
    <FaIcon @icon="minus" />
  </button>
{{else}}
  <button
    class="expand-button"
    {{on "click" @action}}
    aria-label={{@expandButtonLabel}}
  >
    <FaIcon @icon="plus" />
  </button>
{{/if}}

Add labels to expand / collapse buttons
Add labels to expand / collapse buttons

Now consumer can attach these labels to make button accessible.
