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                <ul class="list">
  <li class="list__item">
    <input type="text" value="" class="" name="sample" id="sample" placeholder="例)test">
    <p class="delete">
      <button type="button" class="js-delete-btn">削除</button>

<p class="add">
  <button type="button" class="js-add-btn">追加</button>


                p {
  margin: 0;

input {
  padding: .8em;
  border: 1px solid #bbb;
  border-radius: 3px;

h2 {
  font-size: 13px;
  margin-top: 0;

.list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1em;

.list__item {
  display: inline-block;
  padding: 1em;
  box-shadow: 0 0 3px rgba(0,0,0, .2);
  border-radius: 5px;

/* li.list__itemが1つの時に「削除」ボタンを非表示 */
.list__item:only-of-type .delete{

button {
  border: 0px solid transparent;
  padding: .5em .8em;
  border-radius: 3px;
.delete {
  margin-top: .5em;
  text-align: right;
.delete button {
  background-color: #ddd;
  box-shadow: 0 3px 0 #999;
  color: #444;

.add button {
  background-color: #2e95b5;
  box-shadow: 0 3px 0 #066c8c;
  color: #fff;



                // 追加ボタンを押した時
$('.js-add-btn').on('click',function() {
  // ul.listの中の一番下のli.list__itemをクローン
  var clone = $(this).parent().prev('ul.list').find('li.list__item:last-of-type').clone(true);
  // クローンした要素のinputのvalue属性を空にする
  // クローンしてinputを操作した要素をul.listの一番下に追加

// 削除ボタンを押した時
$('.js-delete-btn').on('click',function() {
  if($('.list__item').length > 1 ) {//li.list__itemが1つより多い時
  // 削除の確認
    var deleteConfirm = confirm('削除してよろしいでしょうか?');
    if(deleteConfirm == true) {// OKを押したら
      // 削除ボタンをクリックしたli.list__itemを削除