{{#if hasBlock}}
  {{yield this}}
{{else}}
  {{input value=value
          classBinding="inputClass"
          tabindex=tabindex
          disabled=disabled
          focus-out='focusOut'
          placeholder=placeholder
          bubbles=true}}
{{/if}}
{{#if hasBlock}}
  {{yield this}}
{{else}}
  {{input value=value
          classBinding="inputClass"
          tabindex=tabindex
          disabled=disabled
          focus-out=(action 'focusOut')
          placeholder=placeholder
          bubbles=true}}
{{/if}}

Use action helper to set focus-out action
fix: Use action helper to set focus-out action
