<button class="el_btn el_btn__plain" type="button">戻る</button>
<button class="el_btn el_btn__plain el_btn__primary" type="button">決定</button>
<button class="el_btn el_btn__plain el_btn__info" type="button">情報</button>
<button class="el_btn el_btn__plain el_btn__success" type="button">登録</button>
<button class="el_btn el_btn__plain el_btn__warning" type="button">注意</button>
<button class="el_btn el_btn__plain el_btn__danger" type="button">削除</button>